Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) API PricingNEW
Anthropic · released 2026-09-22 · merges 5 reasoning-effort tiers
Benchmarks shown for the highest-scoring reasoning tier. Merged tiers: Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, High Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Low Effort, Default Fallback).
Pricing
0.400¢ / 1K
2.00¢ / 1K
0.800¢ / 1K
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | 0.8¢ |
| RAG query | 4,000 in / 500 out | $0.0260 |
| Long document summary | 50,000 in / 1,000 out | $0.2200 |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $0.1600 |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $240.00 |
Cost = (input tokens ÷ 1,000,000 × $4.00) + (output tokens ÷ 1,000,000 × $20.00).
Benchmarks
#1 of 536
Leaderboard neighbours
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) | 57.6 | $8.00 |
| Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) | 53.4 | $20.00 |
| GPT-6 Astra (max) | 52.7 | $20.00 |
| Claude Opus 5 (Adaptive Reasoning, Max Effort) | 50.8 | $10.00 |
More from Anthropic
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) | 53.4 | $20.00 |
| Claude Opus 5 (Adaptive Reasoning, Max Effort) | 50.8 | $10.00 |
| Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) | 49.6 | $20.00 |
| Claude Opus 4.8 (Adaptive Reasoning, Max Effort) | 41.8 | $10.00 |
| Claude Opus 4.7 (Adaptive Reasoning, Max Effort) | 40.7 | $10.00 |
| Claude Sonnet 5 (Adaptive Reasoning, Max Effort) | 38.2 | $4.00 |
| Claude Opus 4.6 (Adaptive Reasoning, Max Effort) | 31.9 | $10.00 |
| Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) | 30.1 | $6.00 |
Count tokens & estimate cost for Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) See Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) on the leaderboard
Source: Artificial Analysis · last synced 2026-09-23
FAQ
Who develops Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)?
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is developed by Anthropic, released 2026-09-22.
How much does Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) cost per million tokens?
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) costs $4.00 per 1M input tokens and $20.00 per 1M output tokens ($8.00 blended), per Artificial Analysis's official pricing data.
How does Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) rank on benchmarks?
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) scores 57.6 on the Artificial Analysis Intelligence Index, ranking #1 of 536 models we track.
Where does this data come from?
Pricing and benchmark data for Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) comes from Artificial Analysis (artificialanalysis.ai), synced daily. Last synced 2026-09-23.