GPT-5.6 Terra

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic tasks where capability and cost need to be balanced, offering strong performance at roughly half the cost of Sol.

openai/gpt-5.6-terra

Organization: OpenAI
Family: gpt-terra
Providers: 39
Context: 1,050,000
Output limit: 128,000
Knowledge: 2026-02-16
Release: 2026-07-09
Updated: 2026-07-09
Weights: Closed
Input: text, image, pdf
Output: text
Capabilities: Tools, Reasoning, Structured

Providers

Compare every cataloged offer for this model, including its provider, route, token limits, price, and capabilities.

61 offers · USD per million tokens

Provider	Model ID	Context	Output	Input / output · 1M	Reasoning	Tools	Structured	Details
302.AI	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
302.AI	gpt-5.6-terra-pro	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Abacus	gpt-5.6-terra	1,000,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
AIHubMix	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
AI-ROUTER	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Amazon Bedrock	global.openai.gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	No	View
Amazon Bedrock	us.openai.gpt-5.6-terra	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	No	View
Amazon Bedrock	openai.gpt-5.6-terra	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
Amazon Bedrock	in.openai.gpt-5.6-terra	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	No	View
Azure	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Azure Cognitive Services	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Cloudflare AI Gateway	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Cortecs	gpt-5.6-terra	1,050,000	128,000	$2.20 / $13.199	Yes	Yes	Yes	View
CrossModel	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Databricks	databricks-gpt-5-6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
DevPass (LLM Gateway)	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
DigitalOcean	openai-gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Eden AI	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
GitHub Copilot	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
GitLab Duo	duo-chat-gpt-5-6-terra	1,050,000	128,000	$0.00 / $0.00	Yes	Yes	Yes	View
Impossibl	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Kenari	gpt-5-6-terra	1,050,000	128,000	$0.00 / $0.00	Yes	Yes	Yes	View
Kilo Gateway	openai/gpt-5.6-terra-pro	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Kilo Gateway	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
LLM Gateway	aws-mantle/gpt-5.6-terra	921,600	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
LLM Gateway	azure/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
LLM Gateway	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Merge Gateway	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
NanoGPT	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
NanoGPT	openai/gpt-5.6-terra-pro	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Neon	gpt-5-6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Ofox	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
OpenAI	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
OpenCode Zen	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Amazon Bedrockvia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-5.6-terra-pro unknown	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-5.6-terra-pro unknown	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$1.00 / $6.00	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra-pro unknown	1,050,000	128,000	$1.00 / $6.00	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra-pro unknown	1,050,000	128,000	$4.00 / $24.00	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra unknown	1,050,000	128,000	$4.00 / $24.00	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-5.6-terra-pro unknown	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Opper	gpt-5.6-terra	1,000,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
OrcaRouter	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Pioneer	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Requesty	gpt-5.6-terra@eu	1,050,000	128,000	$2.20 / $13.20	Yes	Yes	Yes	View
Requesty	gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
routing.run	gpt-5.6-terra	1,000,000	128,000	$1.50 / $9.00	Yes	Yes	Yes	View
SAP AI Core	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Snowflake Cortex	openai-gpt-5.6-terra	1,050,000	128,000	— / —	Yes	Yes	Yes	View
Venice AI	openai-gpt-56-terra-pro	1,000,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Venice AI	openai-gpt-56-terra	1,000,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Vercel AI Gateway	openai/gpt-5.6-terra	1,050,000	128,000	$2.00 / $12.00	Yes	Yes	Yes	View
Vercel AI Gateway	openai/gpt-5.6-terra-fast	1,050,000	128,000	$4.00 / $24.00	Yes	Yes	Yes	View
Vivgrid	gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View
Xpersona	gpt-5.6-terra	372,000	128,000	$1.50 / $2.00	Yes	Yes	Yes	View
ZenMux	openai/gpt-5.6-terra	1,050,000	128,000	$2.50 / $15.00	Yes	Yes	Yes	View

Prices and limits apply to each offer. A dash means the value is not provided. OpenRouter offers show the hosting provider and routing channel separately.

Pricing

Compare token rates and cache charges across available routes and hosting configurations.

USD per million tokens

Input from$0.00Per 1M input tokens

Output from$0.00Per 1M output tokens

Available offers61Across 39 providers

Lowest listed input and output prices across the offers above; they may belong to different providers. These are base rates, before conditional pricing, discounts or additional fees.

Endpoint price comparisonLatest observed snapshot · 10 lowest-priced configurations

InputOutput

OpenAIopenai/flex

$1.00$6.00

OpenAIopenai/flex

$1.00$6.00

Azureazure

$2.00$12.00

OpenAIopenai

$2.00$12.00

Azureazure

$2.00$12.00

OpenAIopenai

$2.00$12.00

Amazon Bedrockamazon-bedrock/us-east-1

$2.20$13.20

Azureazure/eu

$2.20$13.20

Azureazure/us

$2.20$13.20

Azureazure/eu

$2.20$13.20

openai/gpt-5.6-terraObserved Oct 4, 2026, 11:31 AM UTC

Input: $2.00
Output: $12.00
Cache read: $0.20
Cache write: $2.50

Additional fees and pricing conditions

web search: $0.01 / search

overrides · USD per token for token prices; time windows use UTC.

[
  {
    "prompt": "0.000004",
    "completion": "0.000018",
    "input_cache_read": "0.0000004",
    "input_cache_write": "0.000005",
    "min_prompt_tokens": 272000
  }
]

openai/gpt-5.6-terra-proObserved Oct 4, 2026, 11:31 AM UTC

Input: $2.00
Output: $12.00
Cache read: $0.20
Cache write: $2.50

Additional fees and pricing conditions

web search: $0.01 / search

overrides · USD per token for token prices; time windows use UTC.

[
  {
    "prompt": "0.000004",
    "completion": "0.000018",
    "input_cache_read": "0.0000004",
    "input_cache_write": "0.000005",
    "min_prompt_tokens": 272000
  }
]

Hosting prices through OpenRouter All endpoints and cache rates

Endpoint	Input / 1M	Output / 1M	Cache read / 1M	Cache write / 1M
Amazon Bedrockamazon-bedrock/us-east-1	$2.20	$13.20	$0.22	$2.75
Azureazure/eu	$2.20	$13.20	$0.22	$2.75
Azureazure	$2.00	$12.00	$0.20	$2.50
Azureazure/us	$2.20	$13.20	$0.22	$2.75
OpenAIopenai	$2.00	$12.00	$0.20	$2.50
OpenAIopenai/flex	$1.00	$6.00	$0.10	$1.25
OpenAIopenai/fast	$4.00	$24.00	$0.40	$5.00
Azureazure	$2.00	$12.00	$0.20	$2.50
Azureazure/eu	$2.20	$13.20	$0.22	$2.75
OpenAIopenai/flex	$1.00	$6.00	$0.10	$1.25
OpenAIopenai/fast	$4.00	$24.00	$0.40	$5.00
OpenAIopenai	$2.00	$12.00	$0.20	$2.50

Each row is a hosting configuration. Open an offer in Providers for its full pricing conditions and additional fees. Endpoint observations may differ from the routing catalog's base price.

Performance

Review reported latency and output-throughput percentiles from the latest observed rolling window.

Latest 30-minute observation

Time to first token · milliseconds

Latency distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock/us-east-1

3,088–27,212.36 ms

Azureazure

2,194.5–14,905.51 ms

OpenAIopenai

2,238–32,317.97 ms

OpenAIopenai/flex

1,834–17,006.9 ms

OpenAIopenai/fast

943–2,230.76 ms

Azureazure

3,101–9,394.28 ms

All latency percentiles 8 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock/us-east-1	3,088 ms	7,019 ms	15,745.6 ms	27,212.36 ms
Azureazure	2,194.5 ms	3,766.75 ms	6,506 ms	14,905.51 ms
OpenAIopenai	2,238 ms	4,038.25 ms	8,540.9 ms	32,317.97 ms
OpenAIopenai/flex	1,834 ms	3,445 ms	8,016 ms	17,006.9 ms
OpenAIopenai/fast	943 ms	1,246 ms	1,612.6 ms	2,230.76 ms
Azureazure	3,101 ms	3,934 ms	7,514.6 ms	9,394.28 ms
OpenAIopenai/fast	2,004 ms	2,028 ms	2,042.4 ms	2,051.04 ms
OpenAIopenai	6,203 ms	11,838.75 ms	16,755.7 ms	33,544.71 ms

Output throughput · tokens per second

Throughput distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock/us-east-1

44–131 t/s

Azureazure

77–132.44 t/s

OpenAIopenai

79–163.09 t/s

OpenAIopenai/flex

82–190.8 t/s

OpenAIopenai/fast

64–116.2 t/s

Azureazure

49–121.92 t/s

All throughput percentiles 8 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock/us-east-1	44 t/s	85 t/s	109 t/s	131 t/s
Azureazure	77 t/s	95 t/s	105 t/s	132.44 t/s
OpenAIopenai	79 t/s	102 t/s	121 t/s	163.09 t/s
OpenAIopenai/flex	82 t/s	131 t/s	149 t/s	190.8 t/s
OpenAIopenai/fast	64 t/s	93 t/s	100 t/s	116.2 t/s
Azureazure	49 t/s	82 t/s	107.7 t/s	121.92 t/s
OpenAIopenai/fast	43.5 t/s	50.75 t/s	55.1 t/s	57.71 t/s
OpenAIopenai	142 t/s	171 t/s	192 t/s	273.29 t/s

Percentiles describe the observed request distribution. These are snapshots of a rolling window, not a historical time series.

Uptime

Compare successful request rates across the latest 5-minute, 30-minute, and 24-hour observations.

Successful requests by window

Availability by endpointCurrent overlapping windows · 12 endpoints

Endpoint5 minutes30 minutes24 hours

Amazon Bedrockamazon-bedrock/us-east-1Observed Oct 4, 2026, 11:31 AM UTC

—

Azureazure/euObserved Oct 4, 2026, 11:31 AM UTC

—

100%

AzureazureObserved Oct 4, 2026, 11:31 AM UTC

100%

Azureazure/usObserved Oct 4, 2026, 11:31 AM UTC

—

100%

OpenAIopenaiObserved Oct 4, 2026, 11:31 AM UTC

100%

99.99%

OpenAIopenai/flexObserved Oct 4, 2026, 11:31 AM UTC

—

100%

99.99%

OpenAIopenai/fastObserved Oct 4, 2026, 11:31 AM UTC

—

99.91%

AzureazureObserved Oct 4, 2026, 11:31 AM UTC

—

100%

Azureazure/euObserved Oct 4, 2026, 11:31 AM UTC

—

OpenAIopenai/flexObserved Oct 4, 2026, 11:31 AM UTC

—

OpenAIopenai/fastObserved Oct 4, 2026, 11:31 AM UTC

—

100%

OpenAIopenaiObserved Oct 4, 2026, 11:31 AM UTC

—

100%

99.97%

Reported by OpenRouter at the time of collection; rate-limited requests are excluded. A dash means no measurement was reported. This is not a live availability check.

Benchmarks

Review attributed evaluation results on each source's original scale.

External evaluations

openai/gpt-5.6-terraObserved Oct 4, 2026, 11:31 AM UTC

Benchmark profileArtificial Analysis · shared source scale from 0 to 80

Coding

76.7

Agentic

43.2

Intelligence

42.1

Sources: Artificial Analysis and Design Arena, via OpenRouter. Scores retain their original scales and are not OpenAI Suite ratings.

Detailed evaluations

Evaluation scoresAccuracy or item F1 · higher is better

gpqa diamondOpenAI: GPT-5.6 Terra

88.777%

tau bench verified airlineOpenAI: GPT-5.6 Terra

73.111%

Evaluation	Configuration	Source	Results	Details
Composite indices	GPT-5.6 Terra (max)openai/gpt-5.6-terra-20260709	Artificial Analysis	Intelligence 42.1 · Coding 76.7 · Agentic 43.2	Details
gpqa diamond	OpenAI: GPT-5.6 Terraopenai/gpt-5.6-terra-20260709	OpenRouter	88.777%	Details
tau bench verified airline	OpenAI: GPT-5.6 Terraopenai/gpt-5.6-terra-20260709	OpenRouter	73.111%	Details

Sources: Artificial Analysis, Design Arena and OpenRouter. Evaluation configurations and scales differ; results are not interchangeable. Updated Oct 4, 2026.

Apps & session costs

Compare observed median session costs for applications using this model, grouped by conversation length.

30-day sample · through Sep 27, 2026

Application	Model route	Turns	Median cost / session	Details
Codex	openai/gpt-5.6-terra-20260709	2–9 turns	$0.121211	Details
Codex	openai/gpt-5.6-terra-20260709	50+ turns	$2.727157	Details
Hermes Agent	openai/gpt-5.6-terra-20260709	50+ turns	$3.222297	Details
Hermes Agent	openai/gpt-5.6-terra-20260709	2–9 turns	$0.099739	Details
Codex	openai/gpt-5.6-terra-20260709	1 turn	$0.023128	Details
Hermes Agent	openai/gpt-5.6-terra-20260709	1 turn	$0.030908	Details
Codex	openai/gpt-5.6-terra-20260709	10–49 turns	$0.48233	Details
Hermes Agent	openai/gpt-5.6-terra-20260709	10–49 turns	$0.497714	Details
Claude Code	openai/gpt-5.6-terra-20260709	2–9 turns	$0.122459	Details
Hermes Agent	openai/gpt-5.6-terra-pro-20260709	2–9 turns	$0.26904	Details

Source: OpenRouter, as of Oct 2, 2026. Published under CC BY 4.0. These are observed costs per session, not token prices or a forecast for your workload. Apps are compared separately.

Activity

Daily prompt and completion tokens reported for this model's routes in OpenRouter's top 50. Missing days have no published value.

Last 90 complete UTC days

Daily token usage6,196,511,913,984 reported tokens · 78 days with observations

157B0

2026-07-13
19,470,393,444 tokens

2026-07-15
19,507,405,067 tokens

2026-07-16
32,539,533,142 tokens

2026-07-17
23,056,324,008 tokens

2026-07-18
15,751,674,451 tokens

2026-07-19
17,128,362,825 tokens

2026-07-20
23,674,519,511 tokens

2026-07-21
23,153,762,302 tokens

2026-07-22
28,564,754,460 tokens

2026-07-23
26,511,773,093 tokens

2026-07-24
36,330,164,485 tokens

2026-07-25
22,111,562,700 tokens

2026-07-26
21,473,501,789 tokens

2026-07-27
27,374,920,041 tokens

2026-07-28
32,187,518,147 tokens

2026-07-29
68,213,343,932 tokens

2026-07-30
101,576,894,985 tokens

2026-07-31
107,900,056,763 tokens

2026-08-01
78,593,005,222 tokens

2026-08-02
75,365,724,968 tokens

2026-08-03
107,570,059,811 tokens

2026-08-04
116,891,299,275 tokens

2026-08-05
137,191,086,589 tokens

2026-08-06
134,384,651,489 tokens

2026-08-07
125,927,953,272 tokens

2026-08-08
92,642,107,521 tokens

2026-08-09
87,334,051,805 tokens

2026-08-10
124,944,002,360 tokens

2026-08-11
139,044,592,331 tokens

2026-08-12
148,492,912,156 tokens

2026-08-13
157,073,416,086 tokens

2026-08-14
144,101,627,094 tokens

2026-08-15
110,627,182,627 tokens

2026-08-16
106,516,346,648 tokens

2026-08-17
141,837,694,685 tokens

2026-08-18
134,312,303,661 tokens

2026-08-19
117,471,092,806 tokens

2026-08-20
103,423,078,006 tokens

2026-08-21
90,790,676,368 tokens

2026-08-22
53,682,015,536 tokens

2026-08-23
82,077,575,183 tokens

2026-08-24
98,788,250,704 tokens

2026-08-25
100,406,008,804 tokens

2026-08-26
90,774,096,437 tokens

2026-08-27
96,595,829,617 tokens

2026-08-28
87,447,955,021 tokens

2026-08-29
58,750,121,091 tokens

2026-08-30
48,436,768,674 tokens

2026-08-31
88,821,113,666 tokens

2026-09-01
92,527,304,611 tokens

2026-09-02
95,657,664,268 tokens

2026-09-03
101,695,428,195 tokens

2026-09-04
94,129,759,624 tokens

2026-09-05
49,278,152,056 tokens

2026-09-06
45,525,594,006 tokens

2026-09-07
75,646,476,565 tokens

2026-09-08
92,200,814,262 tokens

2026-09-09
86,036,446,552 tokens

2026-09-10
81,774,891,901 tokens

2026-09-11
78,139,949,749 tokens

2026-09-12
51,558,078,313 tokens

2026-09-13
49,833,731,732 tokens

2026-09-14
91,137,727,862 tokens

2026-09-15
93,676,488,019 tokens

2026-09-16
93,912,488,888 tokens

2026-09-17
88,919,211,688 tokens

2026-09-18
87,438,376,246 tokens

2026-09-19
53,761,894,321 tokens

2026-09-20
66,833,926,483 tokens

2026-09-21
112,373,021,186 tokens

2026-09-22
98,578,333,983 tokens

2026-09-23
88,911,451,026 tokens

2026-09-24
76,705,627,641 tokens

2026-09-25
68,826,662,870 tokens

2026-09-27
49,920,459,932 tokens

2026-09-28
76,392,914,916 tokens

2026-09-29
61,897,977,275 tokens

2026-10-02
66,379,995,156 tokens

Jul 6, 2026Oct 3, 2026

Daily observations · 78 days

Date (UTC)	Reported tokens	Reported routes
Oct 2, 2026	66,379,995,156	1
Sep 29, 2026	61,897,977,275	1
Sep 28, 2026	76,392,914,916	1
Sep 27, 2026	49,920,459,932	1
Sep 25, 2026	68,826,662,870	1
Sep 24, 2026	76,705,627,641	1
Sep 23, 2026	88,911,451,026	1
Sep 22, 2026	98,578,333,983	1
Sep 21, 2026	112,373,021,186	1
Sep 20, 2026	66,833,926,483	1
Sep 19, 2026	53,761,894,321	1
Sep 18, 2026	87,438,376,246	1
Sep 17, 2026	88,919,211,688	1
Sep 16, 2026	93,912,488,888	1
Sep 15, 2026	93,676,488,019	1
Sep 14, 2026	91,137,727,862	1
Sep 13, 2026	49,833,731,732	1
Sep 12, 2026	51,558,078,313	1
Sep 11, 2026	78,139,949,749	1
Sep 10, 2026	81,774,891,901	1
Sep 9, 2026	86,036,446,552	1
Sep 8, 2026	92,200,814,262	1
Sep 7, 2026	75,646,476,565	1
Sep 6, 2026	45,525,594,006	1
Sep 5, 2026	49,278,152,056	1
Sep 4, 2026	94,129,759,624	1
Sep 3, 2026	101,695,428,195	1
Sep 2, 2026	95,657,664,268	1
Sep 1, 2026	92,527,304,611	1
Aug 31, 2026	88,821,113,666	1
Aug 30, 2026	48,436,768,674	1
Aug 29, 2026	58,750,121,091	1
Aug 28, 2026	87,447,955,021	1
Aug 27, 2026	96,595,829,617	1
Aug 26, 2026	90,774,096,437	1
Aug 25, 2026	100,406,008,804	1
Aug 24, 2026	98,788,250,704	1
Aug 23, 2026	82,077,575,183	1
Aug 22, 2026	53,682,015,536	1
Aug 21, 2026	90,790,676,368	1
Aug 20, 2026	103,423,078,006	1
Aug 19, 2026	117,471,092,806	1
Aug 18, 2026	134,312,303,661	1
Aug 17, 2026	141,837,694,685	1
Aug 16, 2026	106,516,346,648	1
Aug 15, 2026	110,627,182,627	1
Aug 14, 2026	144,101,627,094	1
Aug 13, 2026	157,073,416,086	1
Aug 12, 2026	148,492,912,156	1
Aug 11, 2026	139,044,592,331	1
Aug 10, 2026	124,944,002,360	1
Aug 9, 2026	87,334,051,805	1
Aug 8, 2026	92,642,107,521	1
Aug 7, 2026	125,927,953,272	1
Aug 6, 2026	134,384,651,489	1
Aug 5, 2026	137,191,086,589	1
Aug 4, 2026	116,891,299,275	1
Aug 3, 2026	107,570,059,811	1
Aug 2, 2026	75,365,724,968	1
Aug 1, 2026	78,593,005,222	1
Jul 31, 2026	107,900,056,763	1
Jul 30, 2026	101,576,894,985	1
Jul 29, 2026	68,213,343,932	1
Jul 28, 2026	32,187,518,147	1
Jul 27, 2026	27,374,920,041	1
Jul 26, 2026	21,473,501,789	1
Jul 25, 2026	22,111,562,700	1
Jul 24, 2026	36,330,164,485	1
Jul 23, 2026	26,511,773,093	1
Jul 22, 2026	28,564,754,460	1
Jul 21, 2026	23,153,762,302	1
Jul 20, 2026	23,674,519,511	1
Jul 19, 2026	17,128,362,825	1
Jul 18, 2026	15,751,674,451	1
Jul 17, 2026	23,056,324,008	1
Jul 16, 2026	32,539,533,142	1
Jul 15, 2026	19,507,405,067	1
Jul 13, 2026	19,470,393,444	1

Source: OpenRouter (openrouter.ai/rankings), as of Oct 4, 2026. CC BY 4.0. Totals include only individually published routes. Tokenizers differ by provider; the aggregated “other” category is never assigned to a model.

Technical details & API

Explore specifications, supported parameters, reasoning controls, and API identifiers for each OpenRouter route.

Current route specifications

openai/gpt-5.6-terraObserved Oct 4, 2026, 11:31 AM UTC

Context: 1,050,000
Maximum output: 128,000
Tokenizer: GPT
Input: file, image, text
Output: text
Moderation: Yes
Knowledge cutoff: 2026-02-16
Added to OpenRouter: 2026-07-09

Base URLhttps://openrouter.ai/api/v1

Model IDopenai/gpt-5.6-terra

Version IDopenai/gpt-5.6-terra-20260709

Reasoning

Required: No
Enabled by default: Yes
Default effort: medium
Supported efforts: max, xhigh, high, medium, low, none

Supported parameters

include_reasoning
max_completion_tokens
max_tokens
reasoning
reasoning_effort
response_format
seed
structured_outputs
tool_choice
tools
verbosity

openai/gpt-5.6-terra-proObserved Oct 4, 2026, 11:31 AM UTC

Context: 1,050,000
Maximum output: 128,000
Tokenizer: GPT
Input: file, image, text
Output: text
Moderation: Yes
Knowledge cutoff: 2026-02-16
Added to OpenRouter: 2026-07-09

Base URLhttps://openrouter.ai/api/v1

Model IDopenai/gpt-5.6-terra-pro

Version IDopenai/gpt-5.6-terra-pro-20260709

Reasoning

Required: No
Enabled by default: Yes
Default effort: medium
Supported efforts: max, xhigh, high, medium, low, none

Supported parameters

include_reasoning
max_completion_tokens
max_tokens
reasoning
reasoning_effort
response_format
seed
structured_outputs
tool_choice
tools
verbosity

Frequently asked questions

Answers based on the model metadata and serving offers currently in the catalog.

How much does GPT-5.6 Terra cost?

Listed rates start at $0.00 per million input tokens and $0.00 per million output tokens. Prices vary by provider and configuration; see Pricing for details.

Which providers offer GPT-5.6 Terra?

There are 61 cataloged offers across 39 providers. Compare model IDs, prices and limits in Providers.

What is the context window?

The cataloged model context is 1,050,000 tokens. Each serving endpoint may apply a different limit.

Does it support tools and structured output?

Tool calling: Yes. Structured output: Yes. Support can vary by endpoint.

Catalog history · 2 recorded revisions

Metadata observations since this model was first cataloged. These are not model release versions.

Sep 14, 2026 · 69c1e1e41b2d
Sep 12, 2026 · 895559e989d3