anthropic
Anthropic: Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Quality Score
98/100
price + capability + benchmarks
Input Price
$4.00
per 1M tokens · checked 2026-09-23
Output Price
$20.00
per 1M tokens · checked 2026-09-23
Context Window
1,000,000
tokens
Benchmark results
Independent, published benchmarks. Blended score 100.0 across 1 benchmark, last refreshed 2026-09-23. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 95.1 |
- Model ID
- anthropic/claude-opus-5.5
- Vendor
- anthropic
- Released
- September 2026
- Tokenizer
- Claude
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $4.00/M input and $20.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.15 |
| Classify 1,000 customer emails | 500k in / 50k out | $3.00 |
| A month of a busy support chatbot | 5M in / 2M out | $60.00 |
Category rankings
Where Anthropic: Claude Opus 5.5 places across the 11 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #17 | Screenshot DebuggingVision · of 25 ranked | 133 |
| #19 | Chart & Graph ReadingVision · of 25 ranked | 137 |
| #22 | Frontend Component DesignCode · of 25 ranked | 131 |
| #23 | Math TutoringEducation · of 25 ranked | 128 |
| #24 | Financial AnalysisProfessional · of 25 ranked | 132 |
| #25 | Creative WritingWriting · of 25 ranked | 144 |
| #25 | Screenwriting & DialogWriting · of 25 ranked | 144 |
| #25 | Academic WritingWriting · of 25 ranked | 144 |
| #25 | Legal DraftingProfessional · of 25 ranked | 144 |
| #25 | OKRs & Strategic PlanningBusiness · of 25 ranked | 144 |
| #25 | Math ProofsResearch · of 25 ranked | 144 |
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Quick answers
- How much does Anthropic: Claude Opus 5.5 cost?
- $4.00 per million input tokens and $20.00 per million output tokens.
- What is Anthropic: Claude Opus 5.5's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does Anthropic: Claude Opus 5.5 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Anthropic: Claude Opus 5.5 process images?
- Yes, it accepts image input.