Claude Sonnet 4.5 (latest)

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence. The model is designed for extended autonomous operation, maintaining task continuity across sessions and providing fact-based progress tracking.

Sonnet 4.5 also introduces stronger agentic capabilities, including improved tool orchestration, speculative parallel execution, and more efficient context and memory management. With enhanced context tracking and awareness of token usage across tool calls, it is particularly well-suited for multi-context and long-running workflows. Use cases span software engineering, cybersecurity, financial analysis, research agents, and other domains requiring sustained reasoning and tool use.

anthropic/claude-sonnet-4-5

Organization: Anthropic
Family: claude-sonnet
Providers: 23
Context: 200,000
Output limit: 64,000
Knowledge: 2025-07-31
Release: 2025-09-29
Updated: 2025-09-29
Weights: Closed
Input: text, image, pdf
Output: text
Capabilities: Tools, Reasoning, Temperature

Providers

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

33 offers · USD per million tokens

Provider	Model ID	Context	Output	Input / output · 1M	Reasoning	Tools	Structured	Details
AIHubMix	claude-sonnet-4-5	1,000,000	64,000	$3.30 / $16.50	Yes	Yes	—	View
Anthropic	claude-sonnet-4-5	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
AnyAPI	anthropic/claude-sonnet-4-5	200,000	64,000	— / —	Yes	Yes	—	View
Cloudflare AI Gateway	anthropic/claude-sonnet-4.5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Cortecs	claude-4-5-sonnet	200,000	64,000	$2.989 / $14.945	Yes	Yes	Yes	View
Databricks	databricks-claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
DevPass (LLM Gateway)	claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Impossibl	anthropic/claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Kilo Gateway	anthropic/claude-sonnet-4.5	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
LLM Gateway	anthropic/claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
LLM Gateway	aws-bedrock/claude-sonnet-4-5	200,000	8,192	$3.00 / $15.00	Yes	Yes	Yes	View
LLM Gateway	vertex-anthropic/claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
NanoGPT	anthropic/claude-sonnet-4.5:thinking	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
NanoGPT	anthropic/claude-sonnet-4.5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
NEAR AI Cloud	anthropic/claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Neon	claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Ofox	anthropic/claude-sonnet-4.5	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Amazon Bedrockvia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.30 / $16.50	Yes	Yes	Yes	View
Amazon Bedrockvia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Anthropicvia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Azurevia OpenRouter	anthropic/claude-sonnet-4.5 unknown	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Claude Platform on AWSvia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Googlevia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.30 / $16.50	Yes	Yes	Yes	View
Googlevia OpenRouter	anthropic/claude-sonnet-4.5 unknown	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Opper	claude-sonnet-4-5	200,000	64,000	$3.30 / $16.50	Yes	Yes	Yes	View
OrcaRouter	anthropic/claude-sonnet-4.5	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Pioneer	claude-sonnet-4-5	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Requesty	claude-sonnet-4-5@eu	1,000,000	64,000	$3.30 / $16.50	Yes	Yes	Yes	View
Requesty	claude-sonnet-4-5	1,000,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
SAP AI Core	anthropic--claude-4.5-sonnet	200,000	64,000	$3.00 / $15.00	Yes	Yes	—	View
Snowflake Cortex	claude-sonnet-4-5	200,000	16,384	— / —	Yes	Yes	—	View
Tempr Gateway	anthropic/claude-sonnet-4-5	200,000	64,000	$3.00 / $15.00	Yes	Yes	Yes	View
Venice AI	claude-sonnet-4-5	198,000	64,000	$3.75 / $18.75	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$2.989Per 1M input tokens

Output from$14.945Per 1M output tokens

Available offers33Across 23 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 · 7 lowest-priced configurations

InputOutput

Amazon Bedrockamazon-bedrock

$3.00$15.00

Anthropicanthropic

$3.00$15.00

Azureazure/global

$3.00$15.00

Claude Platform on AWSclaude-on-aws

$3.00$15.00

Googlegoogle-vertex/global

$3.00$15.00

Amazon Bedrockamazon-bedrock/eu-west-1

$3.30$16.50

Googlegoogle-vertex/us-east5

$3.30$16.50

anthropic/claude-sonnet-4.5Observed Oct 4, 2026, 11:31 AM UTC

Input: $3.00
Output: $15.00
Cache read: $0.30
Cache write: $3.75
Cache write · 1 hour: $6.00

Additional fees and pricing conditions

web search: $0.01 / search

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

[
  {
    "prompt": "0.000006",
    "completion": "0.0000225",
    "input_cache_read": "0.0000006",
    "input_cache_write": "0.0000075",
    "min_prompt_tokens": 200000,
    "input_cache_write_1h": "0.000012"
  }
]

Hosting prices through OpenRouter All endpoints and cache rates

Endpoint	Input / 1M	Output / 1M	Cache read / 1M	Cache write / 1M
Amazon Bedrockamazon-bedrock/eu-west-1	$3.30	$16.50	$0.33	$4.125
Amazon Bedrockamazon-bedrock	$3.00	$15.00	$0.30	$3.75
Anthropicanthropic	$3.00	$15.00	$0.30	$3.75
Azureazure/global	$3.00	$15.00	$0.30	$3.75
Claude Platform on AWSclaude-on-aws	$3.00	$15.00	$0.30	$3.75
Googlegoogle-vertex/us-east5	$3.30	$16.50	$0.33	$4.125
Googlegoogle-vertex/global	$3.00	$15.00	$0.30	$3.75

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 · 5 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock

1,491–5,725.07 ms

Anthropicanthropic

1,030–6,937.6 ms

Azureazure/global

1,356–2,624.47 ms

Claude Platform on AWSclaude-on-aws

1,352–10,924.35 ms

Googlegoogle-vertex/global

1,296.5–9,089.58 ms

All latency percentiles 5 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock	1,491 ms	1,852 ms	2,967.6 ms	5,725.07 ms
Anthropicanthropic	1,030 ms	1,237 ms	1,559 ms	6,937.6 ms
Azureazure/global	1,356 ms	1,518.25 ms	1,722.9 ms	2,624.47 ms
Claude Platform on AWSclaude-on-aws	1,352 ms	1,528 ms	1,901.9 ms	10,924.35 ms
Googlegoogle-vertex/global	1,296.5 ms	1,733.5 ms	2,715.9 ms	9,089.58 ms

Output throughput · tokens per second

Throughput distributionRolling 30-minute snapshot · 5 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock

38–82.09 t/s

Anthropicanthropic

40–82.82 t/s

Azureazure/global

36–44 t/s

Claude Platform on AWSclaude-on-aws

38–49 t/s

Googlegoogle-vertex/global

34–62 t/s

All throughput percentiles 5 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock	38 t/s	44.25 t/s	59 t/s	82.09 t/s
Anthropicanthropic	40 t/s	47 t/s	58 t/s	82.82 t/s
Azureazure/global	36 t/s	38 t/s	40 t/s	44 t/s
Claude Platform on AWSclaude-on-aws	38 t/s	40 t/s	43 t/s	49 t/s
Googlegoogle-vertex/global	34 t/s	38 t/s	41 t/s	62 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 · 7 endpoints

Endpoint5 minutes30 minutes24 hours

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

—

Amazon Bedrockamazon-bedrockObserved Oct 4, 2026, 11:31 AM UTC

100%

99.98%

99.97%

AnthropicanthropicObserved Oct 4, 2026, 11:31 AM UTC

100%

99.98%

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

100%

99.98%

Claude Platform on AWSclaude-on-awsObserved Oct 4, 2026, 11:31 AM UTC

100%

Googlegoogle-vertex/us-east5Observed Oct 4, 2026, 11:31 AM UTC

—

100%

Googlegoogle-vertex/globalObserved Oct 4, 2026, 11:31 AM UTC

—

99.75%

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

anthropic/claude-sonnet-4.5Observed Oct 4, 2026, 11:31 AM UTC

Benchmark profileArtificial Analysis · shared source scale from 0 to 60

Coding

52.1

Agentic

15.8

Intelligence

20.7

Design Arena	Category	Elo	Win rate	Rank
models	3d	1,173	51%	56
models	asciiart	1,216	56.1%	21
models	codecategories	1,189	51.5%	55
models	dataviz	1,176	47.4%	64
models	gamedev	1,179	51.1%	59
models	svg	1,114	52.2%	55
models	uicomponent	1,179	49.4%	61
models	website	1,196	51.8%	60
agents	fullstack	1,049	43.7%	35
agents	mobileapps	1,134	52.9%	31
agents	webapps	1,053	43.2%	36

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 diamondAnthropic: Claude Sonnet 4.5

82.104%

tau bench verified airlineAnthropic: Claude Sonnet 4.5

72.37%

Evaluation	Configuration	Source	Results	Details
gpqa diamond	Anthropic: Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	OpenRouter	82.104%	Details
models · uicomponent	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,179 Elo	Details
models · 3d	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,168 Elo	Details
models · asciiart	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,216 Elo	Details
models · uicomponent	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,168 Elo	Details
models · codecategories	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,188 Elo	Details
Composite indices	Claude 4.5 Sonnet (Reasoning)anthropic/claude-4.5-sonnet-20250929	Artificial Analysis	Intelligence 20.7 · Coding 52.1 · Agentic 15.8	Details
models · asciiart	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,186 Elo	Details
models · gamedev	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,179 Elo	Details
models · codecategories	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,189 Elo	Details
models · dataviz	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,166 Elo	Details
models · svg	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,107 Elo	Details
models · 3d	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,173 Elo	Details
models · website	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,196 Elo	Details
tau bench verified airline	Anthropic: Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	OpenRouter	72.37%	Details
models · website	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,196 Elo	Details
models · dataviz	Claude Sonnet 4.5anthropic/claude-4.5-sonnet-20250929	Design Arena	1,176 Elo	Details
models · gamedev	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,176 Elo	Details
models · svg	Claude Sonnet 4.5 (Thinking)anthropic/claude-4.5-sonnet-20250929	Design Arena	1,114 Elo	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
Claude Code	anthropic/claude-4.5-sonnet-20250929	1 turn	$0.110718	Details
Claude Code	anthropic/claude-4.5-sonnet-20250929	10–49 turns	$0.71017	Details
Claude Code	anthropic/claude-4.5-sonnet-20250929	2–9 turns	$0.146716	Details
Hermes Agent	anthropic/claude-4.5-sonnet-20250929	10–49 turns	$0.654121	Details
Hermes Agent	anthropic/claude-4.5-sonnet-20250929	2–9 turns	$0.104913	Details
Hermes Agent	anthropic/claude-4.5-sonnet-20250929	1 turn	$0.045073	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 usage45,591,095,498 reported tokens · 1 days with observations

46B0

2026-09-11
45,591,095,498 tokens

Jul 6, 2026Oct 3, 2026

Daily observations · 1 days

Date (UTC)	Reported tokens	Reported routes
Sep 11, 2026	45,591,095,498	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

anthropic/claude-sonnet-4.5Observed Oct 4, 2026, 11:31 AM UTC

Context: 1,000,000
Maximum output: 64,000
Tokenizer: Claude
Input: text, image, file
Output: text
Moderation: Yes
Knowledge cutoff: 2025-01-31
Added to OpenRouter: 2025-09-29

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

Model IDanthropic/claude-sonnet-4.5

Version IDanthropic/claude-4.5-sonnet-20250929

Reasoning

Required: No
Enabled by default: Not reported
Default effort: —
Supported efforts: —

Supported parameters

include_reasoning
max_completion_tokens
max_tokens
reasoning
response_format
stop
structured_outputs
temperature
tool_choice
tools
top_k
top_p

Default parameters

top p: 1
temperature: 1

Frequently asked questions

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

How much does Claude Sonnet 4.5 (latest) cost?

Listed rates start at $2.989 per million input tokens and $14.945 per million output tokens. Prices vary by provider and configuration; see Pricing for details.

Which providers offer Claude Sonnet 4.5 (latest)?

There are 33 cataloged offers across 23 providers. Compare model IDs, prices and limits in Providers.

What is the context window?

The cataloged model context is 200,000 tokens. Each serving endpoint may apply a different limit.

Does it support tools and structured output?

Tool calling: Yes. Structured output: Not reported. 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 · d9cfe955648b
Sep 12, 2026 · a7e9fc15eee2