Claude Sonnet 5.5 is 1.3× cheaper per million tokens (blended). Claude Sonnet 5.5 leads quality index by 14.6 points (93.2 vs 78.6). Claude Sonnet 5.5 has the larger context window (1,000,000 vs 400,000 tokens, 2.5×).
Claude Sonnet 5.5 vs GPT-5.2
Live catalog fields. Best-in-row is highlighted.
Claude Sonnet 5.5
Anthropic · anthropic__claude-sonnet-5.5
GPT-5.2
OpenAI · openai__gpt-5.2
Identity
| Field | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Slug | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
|---|---|---|
| Quality index (0–100) | 93.2 | 78.6 |
Cost
| Field | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
|---|---|---|
| Input $ / 1M tokens | $2.00 | $1.75 |
| Cached input $ / 1M | $0.20 | $0.17 |
| Output $ / 1M tokens | $10.00 | $14.00 |
Context
| Field | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
|---|---|---|
| Max context tokens | 1,000,000 | 400,000 |
| Max output tokens | 128,000 | 128,000 |
Modalities
| Field | anthropic__claude-sonnet-5.5 | openai__gpt-5.2 |
|---|---|---|
| Input | text, image, file | file, image, text |
| Output | text | text |