Model Release Radar
Price/capability frontier position, benchmark scores, and community signal
Model Release Radar
Claude Sonnet 5.5
anthropic·closed weights·Proprietary·released Monday, Sep 28, 2026
USD per million tokens via OpenRouter, Anthropic (anthropic). Checked 2026-11-12 20:48 UTC.
| Token type | USD /1M |
|---|---|
| Input | $2 |
| Output | $10 |
| Cache read | $0.1 |
| Cache write (5 minutes) | $2.5 |
| Cache write (1 hour) | $4 |
Cache-write rates with a verified basis replace the ordinary input charge. Unknown rates are never treated as zero.
- Behind frontier AA intelligence index (blended per-1M-token price, 3:1 input/output; not a measured per-task cost) - Gemini 4 Carbon, Gemini 4 Argon, GPT-6.1 Sol, GPT-6 Sol, Kimi K3.1 Pro are priced the same or lower and at least as capable.
This model has not been measured on DeepSWE (or any other benchmark with a real measured per-task cost) yet, so no cost/capability chart is drawn. Its Artificial Analysis benchmark scores are listed below.
Measured cost per task (DeepSWE)
This model has not been measured on DeepSWE (or any other benchmark with a real measured per-task cost) yet.
Artificial Analysis scores
Artificial Analysis scores describe capability. Compare them against estimated token spend with your cache mix; these estimates are not measured task costs.
| Benchmark | Score |
|---|---|
| AA intelligence index | 49.9 |
This page covers 5 reasoning-effort variants of the same model.
| Variant | AA intelligence index | Blended /1M (3:1 input/output) |
|---|---|---|
| Extra-high effort (shown above) | 49.9 | $4.00/1M |
| High effort | 41.5 | $4.00/1M |
| Low effort | 25.6 | $4.00/1M |
| Max effort | 54.5 | $4.00/1M |
| Medium effort | 30.8 | $4.00/1M |
| Variant | Coding Elo | Overall Elo | Votes |
|---|---|---|---|
| Extra-high effort | 1,500 | 1,469 | 13,821 |