Anthropic · API model
Claude Sonnet 5.5
API id claude-sonnet-5-5 prices checked
- Input
- $2.00/1M
- Output
- $10.00/1M
- Context
- 1Mtokens
- Max output
- 128Ktokens
- Knowledge cutoff
- Jun 2026
- Typical request
- $0.007
Pricing
US dollars per 1 million tokens. A typical request (1,000 input + 500 output tokens) costs $0.007 at standard rates.
| Rate | Input | Cached input | Output |
|---|---|---|---|
| Standard | $2.00 | $0.10 | $10.00 |
| BatchAsynchronous, results within 24 hours | $1.00 | — | $5.00 |
Capabilities and limits
| Context window | 1M tokens |
|---|---|
| Max output | 128K tokens |
| Input | TextImagesFiles (PDF) |
| Output | Text |
| Reasoning | Adjustable effort |
| Tool use | Yes |
| Structured output (JSON) | Yes |
| Knowledge cutoff | Jun 2026 |
Lifecycle status
No deprecation or shutdown date announced on Anthropic's official deprecations page as of Oct 23, 2026.
Change history
Launches, price changes and retirements for Claude Sonnet 5.5, newest first, each linked to the vendor's notice.
Claude Haiku 5.5 released at $0.10 / $0.50 per 1M tokens
Prompts above 100K tokens cost $0.50 / $2.50. Sonnet 5.5's cached input drops from $0.20 to $0.10 the same day.
vendorAnthropic
Claude Sonnet 5.5 released at $2 / $10 per 1M tokens
The full 1M-token context window is billed at standard rates.
vendorAnthropic
Benchmarks and speed
Not collected yet. Scores will come only from independent leaderboards, each shown with its source and test date.
Planned: GPQA Diamond, SWE-bench Verified, AIME 2025, LMArena Elo, output speed and time to first token.
Where these numbers come from
Every value is an observation with a source and a date. independent is a third-party catalog, vendor is the model maker's own page, derived is our calculation.
| Field | Value | Source | Observed |
|---|---|---|---|
| Standard price, input / output | $2.00 / $10.00 | vendorAnthropic pricing docs | Nov 5, 2026 |
| Standard price, input / output | $2.00 / $10.00 | independentLiteLLM | Nov 5, 2026 |
| Standard price, input / output | $2.00 / $10.00 | independentOpenRouter | Nov 5, 2026 |
| Release date | 2026-09-28 | vendorAnthropic | Nov 5, 2026 |
| Context window | 1,000,000 | vendorAnthropic model page | Nov 5, 2026 |
| Input types | Text and image on the vendor's model page; OpenRouter also lists file input | vendorAnthropic model page | Nov 5, 2026 |
| Cached input | $0.10, cut from $0.20 on October 7, 2026 | vendorAnthropic Haiku 5.5 launch post | Nov 5, 2026 |
| Benchmarks at launch | Terminal-Bench 4.0 70.6%, Humanity's Last Exam 64.5% with tools (Anthropic's own figures). Its GDPval-AA score differs between two Anthropic posts, 1844 and 1840, so we leave it out | vendorAnthropic launch post | Nov 5, 2026 |
| Typical request | $0.007 | derivedai-magazine calculation: 1,000 input + 500 output tokens | Nov 5, 2026 |