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Claude Sonnet 5.5: price, performance and context
Proprietary Claude Sonnet 5.5 by Anthropic costs $2.00 per 1M input and $10.00 per 1M output tokens, handles up to 1M tokens in one request (≈ 3,000 pages of text) and scores 56 points on the AgentKernel performance index, rank 2 of 212.
Privacy: zero data retention with 2 providers, including in the EU. Availability over the last 24 h: 100%.
Open in the interactive comparisonKey facts
- Licence
- Proprietary: no public weights, only through a provider API
- Input / 1M tokens
- $2.00
- Output / 1M tokens
- $10.00
- Context window
- 1M tokens
- Max. output
- 128K tokens
- Performance index
- 56 points · rank 2 of 212
- Coding index
- n/a
- Agentic index
- n/a
- Cost at your usage
- $4.50 / month
- Knowledge cutoff
- n/a
- In the catalog since
- Sep 28, 2026
- Capabilities
- Reasoning, Vision, Tool Calling, Files
Placements by task
- Rank 2 in Overall
- Rank 9 in Websites
- Rank 2 in UI components
- Rank 2 in Game development
- Rank 2 in Data visualisation
What do you get for $10.00?
Rules of thumb from the cost calculator, base rates without caching or taxes.
| Task | Cost per task | For $10.00 |
|---|---|---|
| Chat repliesA question with a short history, a detailed answer | $0.006 | 1,800 |
| Email draftsBullet points in, a finished email out | $0.005 | 2,200 |
| Document summariesRead 10 pages, write a one-page summary | $0.012 | 860 |
| Code reviewsReview and comment on 500 lines of code | $0.021 | 480 |
| Book analysesAnalyse a 300-page book in one go | $0.22 | 45 |
Cheaper with similar performance
No matching alternative in the catalog.
Stronger models
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| Claude Opus 5.5Anthropic | Proprietary | 57.6 | $9.00 |
Open alternatives
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| MiMo-V2.6-ProXiaomi | Open | 46.3 | $0.653 |
| GLM 5.3Z.ai | Open | 44.8 | $1.79 |
| Kimi K3Moonshot AI | Open | 43.6 | $4.195 |