Claude Sonnet 5.5 at a glance
Anthropic's mid-tier Claude Sonnet 5.5 nearly matches Opus 5.5 on its knowledge-work test and posts large coding gains over Sonnet 5, at half the Opus price.
Current standing
As of
- Rank
- #5of 43 models
Claude Sonnet 5.5 (Max) · 54.5 on the Artificial Analysis Intelligence Index v5.0.1 (opens in a new tab)
- Recorded at publication
- 55 (v5.0.1)
as of
- Current leader
- Gemini 4 Carbon (Google) · 60
Computed from our daily snapshot; it changes as new models are measured. Claude Sonnet 5.5 nears Opus-level knowledge work at $2/$10
What changed with Claude Sonnet 5.5
Claude Sonnet 5.5 launched as claude-sonnet-5-5 on the Claude Platform, AWS, Google Cloud and Microsoft Azure. Anthropic reported 1844 on GDPval-AA v2.1, close to Opus 5.5's 1846, plus 70.6% on Terminal-Bench 4.0 and 80.1% on OSWorld 2.1.
It costs $2 input and $10 output per million tokens. Anthropic says output is more than 30% faster than Sonnet 5 and cost per task can be up to 30% lower. Teams running Sonnet with thinking off must switch to a new between_tools setting before migrating.
Claude Sonnet 5.5 benchmarks and pricing
Values are copied from the linked source on the date shown. They are not IA Compa measurements.
- Artificial Analysis Intelligence Indexas of · Source for Artificial Analysis Intelligence Index: artificialanalysis.ai (opens in a new tab)
- 55 (v5.0.1)
- Output speedas of · Source for Output speed: artificialanalysis.ai (opens in a new tab)
- 153 tokens/s
- Input price per 1M tokensas of · Source for Input price per 1M tokens: anthropic.com (opens in a new tab)
- $2.00
- Output price per 1M tokensas of · Source for Output price per 1M tokens: anthropic.com (opens in a new tab)
- $10.00
- Context windowas of · Source for Context window: artificialanalysis.ai (opens in a new tab)
- 1M tokens
How it compares
Other models in the same category that we have covered, using each model's latest recorded value. (Models)
Claude Sonnet 5.5 reasoning effort
Artificial Analysis tests this model at several reasoning-effort settings. Higher effort usually scores higher but costs more and answers more slowly.
Claude Sonnet 5.5 by effort level
Higher effort lets the model think longer. Here is what each setting scores, how fast it writes, and what it costs on Artificial Analysis.
| Effort | Intelligence Index | Output speed (tokens per second) | Cost to run the index | Blended price (3:1) (per 1M tokens) | Price in / out (per 1M tokens) | First token |
|---|---|---|---|---|---|---|
| Max (Claude Sonnet 5.5 (max)) · Best: highest effort with a score, used in the leaderboard | 55 | 153 | $7,981 | $4 | $2 / $10 | 285 s |
| Extra high (Claude Sonnet 5.5 (xhigh)) | 50 | 137 | $2,903 | $4 | $2 / $10 | 33 s |
| High (Claude Sonnet 5.5 (high)) | 42 | 140 | $1,268 | $4 | $2 / $10 | 13 s |
| Medium (Claude Sonnet 5.5 (medium)) | 31 | 138 | $679 | $4 | $2 / $10 | 5.4 s |
| Low (Claude Sonnet 5.5 (low)) | 26 | 136 | $499 | $4 | $2 / $10 | 3.7 s |
Where to compare Claude Sonnet 5.5
Independent leaderboards and official resources for comparing this model yourself. Rankings change often; each site shows its own current data.
Leaderboards
General leaderboards
Official resources
Why Claude Sonnet 5.5 matters for businesses
Artificial Analysis scores it 55 on Intelligence Index v5.0.1 at 153 tokens per second. For many business workflows, Sonnet 5.5 is the value pick: near-flagship quality at half the Opus rate.
Put it to work: AI Agents
Sources for this story
- Introducing Claude Sonnet 5.5 (opens in a new tab)Official
Anthropic · anthropic.com
- Claude Sonnet 5.5 model page (opens in a new tab)Benchmark
Artificial Analysis · artificialanalysis.ai
Last verified: . IA Compa summarizes public announcements for business readers. We are not affiliated with the companies mentioned. Always confirm details, pricing, and availability with the official source.
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