Claude Sonnet 4.6 is 1.9× cheaper per million tokens (blended). Claude Sonnet 4.6 leads quality index by 2.4 points (84.2 vs 81.8). GPT-5.5 has the larger context window (1,050,000 vs 1,000,000 tokens).
Claude Sonnet 4.6 vs GPT-5.5
Live catalog fields. Best-in-row is highlighted.
Claude Sonnet 4.6
Anthropic · anthropic__claude-sonnet-4.6
GPT-5.5
OpenAI · openai__gpt-5.5
Identity
| Field | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Slug | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
|---|---|---|
| Quality index (0–100) | 84.2 | 81.8 |
Cost
| Field | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
|---|---|---|
| Input $ / 1M tokens | $3.00 | $5.00 |
| Cached input $ / 1M | $0.30 | $0.50 |
| Output $ / 1M tokens | $15.00 | $30.00 |
Context
| Field | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
|---|---|---|
| Max context tokens | 1,000,000 | 1,050,000 |
| Max output tokens | 128,000 | 128,000 |
Modalities
| Field | anthropic__claude-sonnet-4.6 | openai__gpt-5.5 |
|---|---|---|
| Input | text, image, file | file, image, text |
| Output | text | text |