Anthropic model product
Claude Sonnet 5.5
5 is an Anthropic language model for everyday tasks, coding, and creating documents, slides, and spreadsheets.
Updated Oct 23, 2026. Default version: Claude Sonnet 5.5
LLMBoard Score95.2Claude Sonnet 5.5
Coverage40%34 benchmark families
Context window1MTokens
Official input price$2Anthropic API
Claude Sonnet 5.5 Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Claude Sonnet 5.5 Benchmark Results
Benchmark scores for Claude Sonnet 5.5.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkBenchCAD | Score74.70% | Rank01 | Participants7 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkBenchCAD (with Python tool) | Score96.30% | Rank01 | Participants7 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkChartography | Score90.20% | Rank01 | Participants6 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHealthBench | Score65.40% | Rank01 | Participants14 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHealthBench Professional | Score69.20% | Rank01 | Participants20 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkTerminal-Bench 4.0 | Score70.60% | Rank01 | Participants29 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHumanity's Last Exam (with tools) | Score64.50% | Rank01 | Participants5 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkLatchBio SpatialBench Verified | Score72.50% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkArXivMath (with tools) | Score95.20% | Rank01 | Participants1 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkBiomedical image analysis | Score72.20% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkBioMysteryBench (Human Difficult) | Score44.70% | Rank01 | Participants1 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkDe novo protein binder design | Score82.30% | Rank01 | Participants1 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkFrontierCode 1.1 (Extended) | Score64.40% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHealthBench Professional (raw) | Score77.10% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHealthBench (raw) | Score69.40% | Rank01 | Participants1 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkMedicinal Chemistry (ADME) | Score65.30% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkOSWorld 2.1 (partial) | Score80.10% | Rank01 | Participants6 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkOSWorld 2.1 (strict) | Score43.50% | Rank01 | Participants6 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkPhysicianBench | Score63.20% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkProtein Design — Library Ranking | Score54.80% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkProtein Design — Sequence Generation | Score51.00% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkProtocols Troubleshooting | Score67.30% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkProtocols Understanding (V2) | Score66.60% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkArXivMath | Score86.80% | Rank02 | Participants5 | Percentile75.00% | EvidenceC | Evaluated |
| BenchmarkGlobal-MMLU | Score92.10% | Rank02 | Participants8 | Percentile85.71% | EvidenceC | Evaluated |
| BenchmarkHumanity's Last Exam (no tools, text-only) | Score56.90% | Rank02 | Participants14 | Percentile92.31% | EvidenceC | Evaluated |
| BenchmarkSWE-bench Multilingual | Score90.30% | Rank02 | Participants50 | Percentile97.96% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Pro | Score81.30% | Rank02 | Participants63 | Percentile98.39% | EvidenceC | Evaluated |
| BenchmarkTerminal-Bench-Science 0.1 | Score59.90% | Rank02 | Participants7 | Percentile83.33% | EvidenceC | Evaluated |
| BenchmarkLM Arena Webdev | Score1,768.33 rating | Rank02 | Participants107 | Percentile99.06% | EvidenceA | Evaluated |
Claude Sonnet 5.5 Arena Results
Preference and agent-evaluation results for the default version.
Sort by
Arena | Category | Rank | Rating / score | Votes | Observations | Result date |
|---|
| Arenawebdev | Categoryimage to webdev | Rank01 | Rating / score1,737.14 | Votes1,551 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev-react | Rank01 | Rating / score1,816.83 | Votes2,175 | ObservationsN/A | Result date |
| Arenawebdev | Categoryoverall | Rank02 | Rating / score1,768.33 | Votes3,428 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev | Rank02 | Rating / score1,768.33 | Votes3,428 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev-html | Rank02 | Rating / score1,741.04 | Votes483 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryexpert | Rank05 | Rating / score1,533.90 | Votes758 | ObservationsN/A | Result date |
| Arenatext style control | Categoryexpert | Rank06 | Rating / score1,535.52 | Votes851 | ObservationsN/A | Result date |
| Arenatext factuality | Categorycoding | Rank07 | Rating / score1,538.77 | Votes1,875 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryhard prompts english | Rank07 | Rating / score1,522.16 | Votes1,885 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryindustry software and it services | Rank07 | Rating / score1,522.70 | Votes2,790 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryinstruction following | Rank07 | Rating / score1,492.53 | Votes2,750 | ObservationsN/A | Result date |
| Arenatext | Categoryexpert | Rank08 | Rating / score1,530.57 | Votes851 | ObservationsN/A | Result date |
| Arenatext | Categoryinstruction following | Rank08 | Rating / score1,492.48 | Votes2,756 | ObservationsN/A | Result date |
| Arenatext factuality | Categorylonger query | Rank08 | Rating / score1,501.20 | Votes3,434 | ObservationsN/A | Result date |
| Arenatext style control | Categorychinese | Rank08 | Rating / score1,541.55 | Votes685 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry mathematical | Rank08 | Rating / score1,512.44 | Votes445 | ObservationsN/A | Result date |
| Arenatext | Categorycoding | Rank09 | Rating / score1,513.08 | Votes1,914 | ObservationsN/A | Result date |
| Arenatext | Categoryindustry mathematical | Rank09 | Rating / score1,510.21 | Votes445 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryenglish | Rank09 | Rating / score1,490.15 | Votes3,075 | ObservationsN/A | Result date |
| Arenatext | Categorychinese | Rank10 | Rating / score1,534.81 | Votes685 | ObservationsN/A | Result date |
| Arenatext | Categoryfrench | Rank10 | Rating / score1,499.38 | Votes321 | ObservationsN/A | Result date |
| Arenatext | Categorylonger query | Rank10 | Rating / score1,495.26 | Votes3,434 | ObservationsN/A | Result date |
| Arenatext style control | Categoryhard prompts english | Rank10 | Rating / score1,513.62 | Votes1,914 | ObservationsN/A | Result date |
| Arenavision | Categorydiagram | Rank10 | Rating / score1,328.86 | Votes625 | ObservationsN/A | Result date |
| Arenatext | Categoryhard prompts english | Rank11 | Rating / score1,502.05 | Votes1,914 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryhard prompts | Rank11 | Rating / score1,506.89 | Votes5,015 | ObservationsN/A | Result date |
| Arenatext style control | Categorylonger query | Rank11 | Rating / score1,499.98 | Votes3,434 | ObservationsN/A | Result date |
| Arenavision style control | Categorydiagram | Rank11 | Rating / score1,321.29 | Votes625 | ObservationsN/A | Result date |
| Arenavision style control | Categoryhomework | Rank11 | Rating / score1,325.54 | Votes395 | ObservationsN/A | Result date |
| Arenatext | Categoryenglish | Rank12 | Rating / score1,483.83 | Votes3,075 | ObservationsN/A | Result date |
Claude Sonnet 5.5 Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- $2 input, $10 output per 1M
- Official provider
- Anthropic
- Lowest third-party
- From $2 input, $10 output per 1M via NanoGPT
- Tracked offerings
- 33
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderNanoGPT | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAnthropic | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderLLM Gateway | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderKilo Gateway | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderVenice AI | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderOpenRouter | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAzure | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAzure Cognitive Services | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderVercel AI Gateway | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderVertex (Anthropic) | Provider model IDclaude-sonnet-5-5@default | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderOfox | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderMerge Gateway | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderGitHub Copilot | Provider model IDclaude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderEden AI | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderOpenCode | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderDevPass (LLM Gateway) | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderVertex | Provider model IDclaude-sonnet-5-5@default | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderCrossModel | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderRequesty | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAmazon Bedrock | Provider model IDanthropic.claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| Provider302.AI | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderVivgrid | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderCloudflare AI Gateway | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderNEAR AI Cloud | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAIHubMix | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAI/ML API | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderNeon | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderAixy | Provider model IDanthropic/claude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderCommandCode | Provider model IDclaude-sonnet-5-5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
| ProviderPrime Inference | Provider model IDanthropic/claude-sonnet-5.5 | Regionglobal | Input / 1M$2 | Output / 1M$10 | Context1M | Updated |
Claude Sonnet 5.5 Runtime Performance
Provider-specific output speed and catalog latency for Claude Sonnet 5.5. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderAnthropic | Output Speed42.00 tok/s | Catalog Latency0.40 s | Max Input1M | Max Output128K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
Claude Sonnet 5.5 Specifications
Technical details for the model's default version.
- Version
- Claude Sonnet 5.5
- Released
- Sep 28, 2026
- Knowledge cutoff
- Jun 1, 2026
- Parameters
- N/A
- Context window
- 1M
- Max output
- 128K
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
Claude Sonnet 5.5 Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionClaude Sonnet 5.5 | Released | LLMBoard95.15 | ParametersN/A | Context1M | Max output128K | Open weightsNo | LicenseProprietary |
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What is Claude Sonnet 5.5?
Key information about Claude Sonnet 5.5 and its available data.
5 family. It accepts text and image input, produces text, and is available on the Claude API as `claude-sonnet-5-5`.
Data as of 2026-10-22.
FAQ
Common questions about Claude Sonnet 5.5.
When was Claude Sonnet 5.5 released?
Claude Sonnet 5.5's default version was released on Sep 28, 2026.
How much does Claude Sonnet 5.5 cost?
Claude Sonnet 5.5's official API price is $2 per million input tokens and $10 per million output tokens via Anthropic. The lowest tracked third-party offer starts at $2 input and $10 output via NanoGPT.
Who created Claude Sonnet 5.5?
Claude Sonnet 5.5 was created by Anthropic.
What is the context window for Claude Sonnet 5.5?
The default version has a 1M token context window.
Is Claude Sonnet 5.5 open weight?
No. The default version is not marked as having publicly available weights.