Claude Sonnet 5.5 (Max, Default Fallback) API PricingNEW
Anthropic · released 2026-09-28 · merges 5 reasoning-effort tiers
Also searched as: Claude Sonnet 5.5 pricing · Sonnet 5.5 price
Benchmarks shown for the highest-scoring reasoning tier. Merged tiers: Claude Sonnet 5.5 (Max, Default Fallback), Claude Sonnet 5.5 (Xhigh, Default Fallback), Claude Sonnet 5.5 (High, Default Fallback), Claude Sonnet 5.5 (Medium, Default Fallback), Claude Sonnet 5.5 (Low, Default Fallback).
Claude Sonnet 5.5 price
0.200¢ / 1K
1.00¢ / 1K
0.400¢ / 1K
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | 0.4¢ |
| RAG query | 4,000 in / 500 out | $0.0130 |
| Long document summary | 50,000 in / 1,000 out | $0.1100 |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $0.0800 |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $120.00 |
Cost = (input tokens ÷ 1,000,000 × $2.00) + (output tokens ÷ 1,000,000 × $10.00).
Benchmarks
#2 of 547
Leaderboard neighbours
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Claude Opus 5.5 (Max, Default Fallback) | 57.6 | $8.00 |
| Claude Sonnet 5.5 (Max, Default Fallback) | 56.0 | $4.00 |
| Muse Wonder Full (Max) | 55.8 | — |
| Claude Fable 5.1 (Max, Default Fallback) | 53.4 | $20.00 |
| GPT-6 Astra (Max) | 52.7 | $20.00 |
More from Anthropic
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Claude Opus 5.5 (Max, Default Fallback) | 57.6 | $8.00 |
| Claude Fable 5.1 (Max, Default Fallback) | 53.4 | $20.00 |
| Claude Opus 5 (Max) | 50.8 | $10.00 |
| Claude Fable 5 (Max, Opus 4.8 Fallback) | 49.6 | $20.00 |
| Claude Haiku 5.5 (Max) | 43.4 | $0.20 |
| Claude Opus 4.8 (Max) | 41.8 | $10.00 |
| Claude Opus 4.7 (Max) | 40.7 | $10.00 |
| Claude Sonnet 5 (Max) | 38.2 | $4.00 |
Count tokens & estimate cost for Claude Sonnet 5.5 (Max, Default Fallback) See Claude Sonnet 5.5 (Max, Default Fallback) on the leaderboard
Source: Artificial Analysis · last synced 2026-10-15
FAQ
Who develops Claude Sonnet 5.5 (Max, Default Fallback)?
Claude Sonnet 5.5 (Max, Default Fallback) is developed by Anthropic, released 2026-09-28.
How much does Claude Sonnet 5.5 (Max, Default Fallback) cost per million tokens?
Claude Sonnet 5.5 (Max, Default Fallback) costs $2.00 per 1M input tokens and $10.00 per 1M output tokens ($4.00 blended), per Artificial Analysis's official pricing data.
What is the Claude Sonnet 5.5 API price?
The Claude Sonnet 5.5 API price is $2.00 per 1M input tokens and $10.00 per 1M output tokens ($4.00 per 1M blended).
How much does Claude Sonnet 5.5 cost for a typical request?
A short chat reply (500 in / 300 out tokens) costs about 0.4¢ on Claude Sonnet 5.5, at $2.00/1M input and $10.00/1M output.
Is Claude Sonnet 5.5 free?
Claude Sonnet 5.5's official API list price is $2.00 per 1M input tokens and $10.00 per 1M output tokens. This site tracks list prices only, not free tiers or trial credits — check Anthropic's site for those.
How does Claude Sonnet 5.5 (Max, Default Fallback) rank on benchmarks?
Claude Sonnet 5.5 (Max, Default Fallback) scores 56.0 on the Artificial Analysis Intelligence Index, ranking #2 of 547 models we track.
Where does this data come from?
Pricing and benchmark data for Claude Sonnet 5.5 (Max, Default Fallback) comes from Artificial Analysis (artificialanalysis.ai), synced daily. Last synced 2026-10-15.