Claude Sonnet 4 vs GPT-5.5
| Claude Sonnet 4 | GPT-5.5 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Context Window | 200,000 | 400,000 |
| Release Date | 2025-05-21 | — |
| Input Price | $3.00/ 1M tokens | $5.00/ 1M tokens |
| Output Price | $15.00/ 1M tokens | $30.00/ 1M tokens |
| Best for | reasoning · coding · analysis · tool use | coding · professional work · complex reasoning · agents |
Capabilities
| Claude Sonnet 4 | GPT-5.5 | |
|---|---|---|
| Vision | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Coding | ✓ | ✓ |
| Audio | ✗ | ✗ |
| Tools | ✓ | ✓ |
| Long Context | ✓ | ✓ |
Ranking Comparison
| Claude Sonnet 4 | GPT-5.5 | |
|---|---|---|
| Overall | 92.1 | 47.1 |
| Benchmark | 90 | 0 |
| Capability | 85.7 | 85.7 |
| Price Efficiency | 100 | 100 |
| Context | 100 | 100 |
Overall = Benchmark 50% + Capability 20% + Price Efficiency 20% + Context 10%.
Benchmark Comparison
| Claude Sonnet 4 | GPT-5.5 | |
|---|---|---|
| Coding | — | — |
| Reasoning | — | — |
| Math | — | — |
| Vision | — | — |
Price History
Claude Sonnet 4
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $3.00 | $15.00 |
/ 1M tokens
GPT-5.5
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $5.00 | $30.00 |
/ 1M tokens
Claude Sonnet 4
Anthropic's balanced frontier model: strong reasoning with great cost-efficiency.
GPT-5.5
OpenAI's most advanced model for coding and professional work, with a 400K context window.