List price
Input / 1M$2.00Output / 1M$10.00Cache read / 1M$0.10Blended$8.000Value index114.2Last move—
models.dev · MIT · retrieved Oct 23, 2026
Anthropic
Claude Sonnet 5.5
Claude Sonnet 5.5 is listed by Anthropic at $2 input and $10 output per million tokens. The recorded context window is 1,000,000 tokens. Release date on file: 2026-09-28. LMArena's text board published 2026-10-20 gives it an overall rating of 1472.6 (rank 28, 8,126 votes). Price source: models.dev (MIT).
- Context95
- Inverse price98
- Arena85
- GPQA99
- Tools100
- Modalities67
Price history
Input and output list price. A missing day stays a gap in the line. The series is not a quality history.
Benchmarks
LMArena is CC-BY-4.0. Epoch scores, including LiveBench where Epoch publishes it, are CC-BY-4.0. A blank cell means this snapshot has no match. Nothing here is estimated.
| Benchmark | Score | Detail | Source |
|---|---|---|---|
| LMArena overall | 1472.6 | rank 28 · 8,126 votes | LMArena leaderboard dataset · CC-BY-4.0 |
| LMArena coding | 1513.1 | rank 13 · 1,914 votes | LMArena leaderboard dataset · CC-BY-4.0 |
| LMArena math | 1496.7 | rank 18 · 416 votes | LMArena leaderboard dataset · CC-BY-4.0 |
| GPQA Diamond | 95.6% | — | Epoch AI Capabilities & benchmarking · CC-BY-4.0 |
| LiveBench | — | — | — |
| SWE-bench Verified | — | — | — |
| Epoch Capability Index | 166.18 | 163.06–171.34 | Epoch AI Capabilities & benchmarking · CC-BY-4.0 |
Provider prices
The list row is the price used for the value index. Other rows are the same model id on models.dev, plus the LiteLLM catalog price when we have one. A split quote is kept beside the list price.
| Quote | Provider | Input / 1M | Output / 1M | Blended | Source |
|---|---|---|---|---|---|
| List | Anthropic | $2.00 | $10.00 | $8.000 | models.dev · MIT |
| Also listed | Standard Compute | $2.00 | $10.00 | $8.000 | models.dev · MIT |
| Also listed | Merge Gateway | $2.00 | $10.00 | $8.000 | models.dev · MIT |
| Also listed | AI/ML API | $2.00 | $10.00 | $8.000 | models.dev · MIT |
| LiteLLM | anthropic | $2.00 | $10.00 | $8.000 | LiteLLM model_prices_and_context_window.json · MIT |
Spec
Context1,000,000Max output128,000Inputtext, image, pdfOutputtextReleased2026-09-28Open weightsNo
Spec fields are from the models.dev row for Anthropic.