Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing polished documents, slides, and spreadsheets, and it writes and communicates more clearly than its predecessor.
Thinking is always on, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings keep it responsive for everyday agentic loops.
- Organization
- Anthropic
- Family
- claude-sonnet
- Providers
- 34
- Context
- 1,000,000
- Output limit
- 128,000
- Knowledge
- 2026-06
- Release
- 2026-09-28
- Updated
- —
- Weights
- Closed
- Input
- text, image/jpeg, image/png, image/gif, image/webp, application/pdf
- Output
- text
- Capabilities
- —
Providers
Compare every cataloged offer for this model, including its provider, route, token limits, price, and capabilities.
| Provider | Model ID | Context | Output | Input / output · 1M | Reasoning | Tools | Structured | Details |
|---|---|---|---|---|---|---|---|---|
| 302.AI | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| AIHubMix | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| AI/ML API | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Aixy | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Amazon Bedrock | us.anthropic.claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Amazon Bedrock | anthropic.claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Amazon Bedrock | eu.anthropic.claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Amazon Bedrock | global.anthropic.claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Anthropic | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Azure | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Cloudflare AI Gateway | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| CommandCode | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Cortecs | claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| CrossModel | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| DevPass (LLM Gateway) | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| DigitalOcean | anthropic-claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Eden AI | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Eden AI | anthropic/claude-sonnet-latest | 1,000,000 | 128,000 | — / — | — | — | — | View |
| GitHub Copilot | claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| GitLab Duo | duo-chat-sonnet-5-5 | 1,000,000 | 64,000 | — / — | — | — | — | View |
| Kilo Gateway | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| LLM Gateway | aws-bedrock/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| LLM Gateway | azure-anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| LLM Gateway | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Merge Gateway | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| NanoGPT | anthropic/claude-sonnet-5.5:thinking | 1,000,000 | 128,000 | — / — | — | — | — | View |
| NanoGPT | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| NEAR AI Cloud | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Neon | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Ofox | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| OpenCode | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Amazon Bedrockvia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.00 / $10.00 | Yes | Yes | No | View |
| Anthropicvia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.00 / $10.00 | Yes | Yes | Yes | View |
| Azurevia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.20 / $11.00 | Yes | Yes | Yes | View |
| Azurevia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.00 / $10.00 | Yes | Yes | Yes | View |
| Claude Platform on AWSvia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.00 / $10.00 | Yes | Yes | No | View |
| Googlevia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.20 / $11.00 | Yes | Yes | Yes | View |
| Googlevia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.20 / $11.00 | Yes | Yes | Yes | View |
| Googlevia OpenRouter | anthropic/claude-sonnet-5.5 unknown | 1,000,000 | 128,000 | $2.00 / $10.00 | Yes | Yes | Yes | View |
| Perplexity Agent | anthropic/claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Prime Inference | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Requesty | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Requesty | claude-sonnet-5-5@eu | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Standard Compute | anthropic/claude-sonnet-5.5 | 1,000,000 | 50,000 | — / — | — | — | — | View |
| Venice AI | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Vercel AI Gateway | anthropic/claude-sonnet-5.5 | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Vertex | claude-sonnet-5-5@default | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Vertex (Anthropic) | claude-sonnet-5-5@default | 1,000,000 | 128,000 | — / — | — | — | — | View |
| Vivgrid | claude-sonnet-5-5 | 1,000,000 | 128,000 | — / — | — | — | — | 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.
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.
anthropic/claude-sonnet-5.5Observed - Input
- $2.00
- Output
- $10.00
- Cache read
- $0.10
- Cache write
- $2.50
- Cache write · 1 hour
- $4.00
Additional fees and pricing conditions
- web search
- $0.01 / search
Hosting prices through OpenRouter All endpoints and cache rates
| Endpoint | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M |
|---|---|---|---|---|
| Amazon Bedrockamazon-bedrock | $2.00 | $10.00 | $0.10 | $2.50 |
| Anthropicanthropic | $2.00 | $10.00 | $0.10 | $2.50 |
| Azureazure/us | $2.20 | $11.00 | $0.11 | $2.75 |
| Azureazure/global | $2.00 | $10.00 | $0.10 | $2.50 |
| Claude Platform on AWSclaude-on-aws | $2.00 | $10.00 | $0.10 | $2.50 |
| Googlegoogle-vertex/europe | $2.20 | $11.00 | $0.11 | $2.75 |
| Googlegoogle-vertex/us | $2.20 | $11.00 | $0.11 | $2.75 |
| Googlegoogle-vertex/global | $2.00 | $10.00 | $0.10 | $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.
Time to first token · milliseconds
All latency percentiles 8 endpoints
| Endpoint | P50 | P75 | P90 | P99 |
|---|---|---|---|---|
| Amazon Bedrockamazon-bedrock | 1,799 ms | 3,402.5 ms | 5,016.4 ms | 8,103.68 ms |
| Anthropicanthropic | 1,940.5 ms | 2,844 ms | 3,948.7 ms | 8,801.43 ms |
| Azureazure/us | 1,043.5 ms | 2,059 ms | 2,780.5 ms | 3,801.6 ms |
| Azureazure/global | 1,048 ms | 2,105 ms | 2,710 ms | 5,189.63 ms |
| Claude Platform on AWSclaude-on-aws | 2,713 ms | 3,969 ms | 7,423.9 ms | 49,389.78 ms |
| Googlegoogle-vertex/europe | 598 ms | 1,583 ms | 2,377.6 ms | 3,755.6 ms |
| Googlegoogle-vertex/us | 1,991 ms | 2,270 ms | 3,483.8 ms | 3,797.4 ms |
| Googlegoogle-vertex/global | 2,525 ms | 3,376 ms | 4,893.7 ms | 13,624.06 ms |
Output throughput · tokens per second
All throughput percentiles 8 endpoints
| Endpoint | P50 | P75 | P90 | P99 |
|---|---|---|---|---|
| Amazon Bedrockamazon-bedrock | 88 t/s | 112 t/s | 136 t/s | 181 t/s |
| Anthropicanthropic | 108 t/s | 131 t/s | 161 t/s | 200 t/s |
| Azureazure/us | 102 t/s | 123 t/s | 150 t/s | 192.01 t/s |
| Azureazure/global | 111 t/s | 141 t/s | 168 t/s | 197 t/s |
| Claude Platform on AWSclaude-on-aws | 103 t/s | 132 t/s | 155 t/s | 192 t/s |
| Googlegoogle-vertex/europe | 105 t/s | 129 t/s | 153 t/s | 197 t/s |
| Googlegoogle-vertex/us | 95.5 t/s | 150.75 t/s | 166.8 t/s | 204.38 t/s |
| Googlegoogle-vertex/global | 110 t/s | 138 t/s | 162 t/s | 201 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.
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.
anthropic/claude-sonnet-5.5Observed | Design Arena | Category | Elo | Win rate | Rank |
|---|---|---|---|---|
| models | dataviz | 1,377 | 65.2% | 2 |
| models | gamedev | 1,450 | 69% | 2 |
| models | uicomponent | 1,383 | 64.8% | 2 |
| models | website | 1,307 | 52.3% | 10 |
Sources: Artificial Analysis and Design Arena, via OpenRouter. Scores retain their original scales and are not OpenAI Suite ratings.
Detailed evaluations
| Evaluation | Configuration | Source | Results | Details |
|---|---|---|---|---|
| models · gamedev | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,423 Elo | Details |
| tau bench verified airline | Anthropic: Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | OpenRouter | 78.667% | Details |
| models · uicomponent | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,369 Elo | Details |
| gpqa diamond | Anthropic: Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | OpenRouter | 92.719% | Details |
| models · dataviz | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,382 Elo | Details |
| models · codecategories | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,356 Elo | Details |
| models · 3d | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,400 Elo | Details |
| models · website | Claude Sonnet 5.5anthropic/claude-sonnet-5.5-20260928 | Design Arena | 1,327 Elo | Details |
| Composite indices | Claude Sonnet 5.5 (Max, Default Fallback)anthropic/claude-sonnet-5.5-20260928 | Artificial Analysis | Intelligence 56 · Coding — · Agentic — | Details |
Sources: Artificial Analysis, Design Arena and OpenRouter. Evaluation configurations and scales differ; results are not interchangeable. Updated Oct 24, 2026.
Apps & session costs
Compare observed median session costs for applications using this model, grouped by conversation length.
| Application | Model route | Turns | Median cost / session | Details |
|---|---|---|---|---|
| Kilo Code | anthropic/claude-sonnet-5.5-20260928 | 50+ turns | $4.794485 | Details |
| Kilo Code | anthropic/claude-sonnet-5.5-20260928 | 10–49 turns | $0.812236 | Details |
| Claude Code | anthropic/claude-sonnet-5.5-20260928 | 2–9 turns | $0.154552 | Details |
| Hermes Agent | anthropic/claude-sonnet-5.5-20260928 | 10–49 turns | $0.534282 | Details |
| Kilo Code | anthropic/claude-sonnet-5.5-20260928 | 2–9 turns | $0.193091 | Details |
| Hermes Agent | anthropic/claude-sonnet-5.5-20260928 | 50+ turns | $3.923185 | Details |
| Hermes Agent | anthropic/claude-sonnet-5.5-20260928 | 1 turn | $0.022381 | Details |
| Codex | anthropic/claude-sonnet-5.5-20260928 | 1 turn | $0.031768 | Details |
| Claude Code | anthropic/claude-sonnet-5.5-20260928 | 50+ turns | $4.346772 | Details |
| Hermes Agent | anthropic/claude-sonnet-5.5-20260928 | 2–9 turns | $0.085302 | Details |
| Claude Code | anthropic/claude-sonnet-5.5-20260928 | 1 turn | $0.071301 | Details |
| Claude Code | anthropic/claude-sonnet-5.5-20260928 | 10–49 turns | $0.595883 | Details |
Source: OpenRouter, as of Oct 20, 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.
98,672,881,662 tokens
138,238,390,647 tokens
153,186,607,580 tokens
141,082,047,783 tokens
129,983,524,979 tokens
113,692,596,496 tokens
150,876,932,599 tokens
362,784,797,924 tokens
343,289,808,857 tokens
246,925,979,420 tokens
366,274,983,443 tokens
427,338,886,709 tokens
530,462,835,686 tokens
374,296,683,595 tokens
371,470,597,135 tokens
387,782,707,310 tokens
316,841,824,822 tokens
396,500,140,033 tokens
314,403,684,743 tokens
290,688,220,161 tokens
350,109,749,325 tokens
417,632,049,427 tokens
441,349,308,496 tokens
418,158,609,076 tokens
352,457,101,020 tokens
Daily observations · 25 days
| Date (UTC) | Reported tokens | Reported routes |
|---|---|---|
| Oct 23, 2026 | 352,457,101,020 | 1 |
| Oct 22, 2026 | 418,158,609,076 | 1 |
| Oct 21, 2026 | 441,349,308,496 | 1 |
| Oct 20, 2026 | 417,632,049,427 | 1 |
| Oct 19, 2026 | 350,109,749,325 | 1 |
| Oct 18, 2026 | 290,688,220,161 | 1 |
| Oct 17, 2026 | 314,403,684,743 | 1 |
| Oct 16, 2026 | 396,500,140,033 | 1 |
| Oct 15, 2026 | 316,841,824,822 | 1 |
| Oct 14, 2026 | 387,782,707,310 | 1 |
| Oct 13, 2026 | 371,470,597,135 | 1 |
| Oct 12, 2026 | 374,296,683,595 | 1 |
| Oct 11, 2026 | 530,462,835,686 | 1 |
| Oct 10, 2026 | 427,338,886,709 | 1 |
| Oct 9, 2026 | 366,274,983,443 | 1 |
| Oct 8, 2026 | 246,925,979,420 | 1 |
| Oct 7, 2026 | 343,289,808,857 | 1 |
| Oct 6, 2026 | 362,784,797,924 | 1 |
| Oct 5, 2026 | 150,876,932,599 | 1 |
| Oct 4, 2026 | 113,692,596,496 | 1 |
| Oct 3, 2026 | 129,983,524,979 | 1 |
| Oct 2, 2026 | 141,082,047,783 | 1 |
| Oct 1, 2026 | 153,186,607,580 | 1 |
| Sep 30, 2026 | 138,238,390,647 | 1 |
| Sep 29, 2026 | 98,672,881,662 | 1 |
Source: OpenRouter (openrouter.ai/rankings), as of Oct 24, 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.
anthropic/claude-sonnet-5.5Observed - Context
- 1,000,000
- Maximum output
- 128,000
- Tokenizer
- Claude
- Input
- text, image, file
- Output
- text
- Moderation
- Yes
- Added to OpenRouter
- 2026-09-28
https://openrouter.ai/api/v1anthropic/claude-sonnet-5.5anthropic/claude-sonnet-5.5-20260928Reasoning
- Required
- Yes
- Enabled by default
- Not reported
- Default effort
- high
- Supported efforts
- max, xhigh, high, medium, low
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity
Frequently asked questions
Answers based on the model metadata and serving offers currently in the catalog.
How much does Claude Sonnet 5.5 cost?
Listed rates start at $2.00 per million input tokens and $10.00 per million output tokens. Prices vary by provider and configuration; see Pricing for details.
Which providers offer Claude Sonnet 5.5?
There are 49 cataloged offers across 34 providers. Compare model IDs, prices and limits in Providers.
What is the context window?
The cataloged model context is 1,000,000 tokens. Each serving endpoint may apply a different limit.
Does it support tools and structured output?
Tool calling: Not reported. 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.
- ·
a8d588edc1cd - ·
9d0ae8b7bbce