Claude Sonnet 5.5
anthropic/claude-sonnet-5.5- Anthropic
- Family · Claude Sonnet 5
- Released 28 Sep 2026
- Text · Image · File → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Not on OSMEXO yet
Spec & list price
Context1M
Max output128K
Input / 1M$2.00
Output / 1M$10.005× input
Scores · standing
Intelligence56.0#4/489
LiveBench80.0#5/32
Usage
Tokens / day221.6B▲ 2.8% 7d
Usage rank#22
Requests / day3.7M
Tool calls / req0.40
Per request · 30 days
Avg input57.3K3.8× median
Avg output9241.3× median
Cache hit82%1.2× median
Reasoning share47%0.8× median
Tool-call failures2.3%1.2× median
Consumption
Peak 573.2B 29 OctLow 14.1B 28 SepRank today #22
News & trends
55 mentions this week ▲ 358%this model · videos, posts, articles · 30 days
Trending · 14 days
- Qwen 3.8 27B vs Claude Sonnet 5.5: RTX 5090 vs the Cloud, 4 Real Tests2.1K views
- Qwen 3.8 27B vs Claude Sonnet 5.5: RTX 5090 vs the Cloud, 4 Real Coding Tests1.5K views
- @ArtificialAnlys on X651.9K views
News · latest from Anthropic
- Claude Opus 5.5 and Claude Sonnet 5.5 are now available in Google AntigravityGoogle Cloud · 20 Oct
- GLM-5.3 vs. Claude Fable 5 on DeepSWE: Cost, Coding, and RoutingTogether AI · 21 Aug
- DeepSeek V4 Pro 0813 vs Claude Fable 5 on DeepSWE: Cost, Coding, and RoutingTogether AI · 17 Aug
- Kimi K2.7 Code vs Claude Fable 5: Landing pages that cost 94% lessTogether AI · 17 Jun
Benchmarks
bar = share of the top score · Benchmark data: Artificial AnalysisSpeed · median across 9 providers, latest day
Output speed#63/334105 tok/s1.6× faster than median
Fastest provider112 tok/sbest of 9 providers
First token#1801.17 s1.1× longer than median
First answer token#100281 sthinking included
Best value in its score band
Value
Intelligence Index
Blended price per 1M tokens (log)
Family progress
Intelligence Index
- Family releases56.0
LiveBench suites
Browser89.3
Coding94.7
Data Analysis59.5
Design85.0
Long Agentic63.4
Reasoning91.6
Research83.6
▲ Strongest: Coding, Reasoning. ▼ Weakest: Data Analysis (60).
Technical details
- Reasoning
- on · high
- Tokenizer
- Claude
- Moderation
- moderated
Reasoning effort
- max
- xhigh
- high · default
- medium
- low
Request parameters 11
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_tokens
- max_completion_tokens
- stop
+1 more
- verbosity
Interesting facts
- Less output room than similar models (128.0K against a 535.9K median).
- Released 35 days ago, the newest of 2 Claude Sonnet 5 models.
When to use
Best for
- Everyday coding agents on large codebases
- Long autonomous agent workflows
- Reasoning and research assistants
- Design and front-end generation
- Long document and image analysis
Think twice for
- Data analysis (its weakest suite)
- High-volume simple chat (cheaper options exist)
- Self-hosting (closed weights)
- Image generation
Research papers
- Secure and Functional Code Generation with Self-Evaluation24 Oct
- Lessons Outlive Their Failures: A Case Study of Rules for AI Coding Agents23 Oct
- From Seeing to Reporting: A Theory of Reliable Visual Set Generation in Vision-Language Models18 Oct
- Good Judgment, Bad Advice: Decision-Model Controllers Raise Agent Cost Without Improving Success17 Oct
- VulnBump: A Benchmark for Fixing Vulnerable Dependencies in Real Projects While Keeping the Build and Tests Green12 Oct
- Right Number, Wrong State? Measuring Cross-Jurisdiction Substitution in LLM Recall of State Policy7 Oct
- Search Engines Never Say No: How Frozen Agents React When the Retrieval Tool Refuses4 Oct
- Pushing the Frontier of Black-Box LVLM Attacks via Fine-Grained Detail Targeting19 Feb
Social
Most watched and discussed · 90 days
- Qwen 3.8 27B vs Claude Sonnet 5.5: RTX 5090 vs the Cloud, 4 Real TestsLaxmi Kant | KGP Talkie · 2.1K views · 30 Oct
- Qwen 3.8 27B vs Claude Sonnet 5.5: RTX 5090 vs the Cloud, 4 Real Coding TestsLaxmi Kant | KGP Talkie · 1.5K views · 30 Oct
- Grey Blender block-out vs finished film ⚔️🐉 Claude Sonnet 5.5 × Kleo AIKleo · 1.3K views · 27 Oct
- GPT-6.1 Terra против Claude Sonnet 5.5: проверил на своих задачах #claude #chatgptAi-native Сямыч · 1.3K views · 26 Oct
- Kimi K3.1 Pro ราคาเท่า Claude Sonnet 5.5 เป๊ะ ใครเก่งกว่าKreycin · 1.0K views · 28 Oct
- GPT-6.1 Terra vs Claude Sonnet 5.5: 10-Round SHOWDOWNLifey Guy · 898 views · 26 Oct
- Jev (new): Jev 1.14 Explained: The Update That Lets AI See Photosssktechy · 821 views · 30 Oct
- Pancake Tower - Claude Sonnet 5.5 vs Opus 5.5 vs GPT-6.1 Sol vs Gemini 4 ArgonPrompt Versus · 608 views · 29 Oct
- Gemini 4 Carbon vs Claude Sonnet 5.5: 10-Round SHOWDOWNLifey Guy · 485 views · 28 Oct
- Claude Sonnet 5.5 за 5 минут сделал лучший дизайн приложенияДока ИИ | Локальный агент · 482 views · 28 Oct
- Claude Sonnet 5.5 vs GPT-6.1 Terra: Which AI Team Makes the Better Smash Trailer?EcoBench · 462 views · 26 Oct
- One Claude Sonnet 5.5 prompt built this bridge race video gamePromptBase · 366 views · 28 Oct
Same family
Claude Sonnet 5- 38.2
Alternatives
other vendors · similar capability- 54.5
- 52.6
- 55.1
- 51.0
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