Claude Opus 5.5 vs Claude Sonnet 5
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Claude Sonnet 5 is 2.0× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 scores higher on the Artificial Analysis Intelligence Index (57.6 vs 38.2).
| Claude Opus 5.5 | Claude Sonnet 5 | |
|---|---|---|
| Input price / 1M | $4.00 | $2.00 |
| Output price / 1M | $20.00 | $10.00 |
| Blended price (3:1) | $8.00 | $4.00 |
| Cached input / 1M | $0.20 | $0.20 |
| Context window | 1M | 1M |
| Max output | 128K | 128K |
| Intelligence index | 57.6 | 38.2 |
| Coding index | — | 71.5 |
| Providers | 11 | 10 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-22 | 2026-06-30 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, Claude Opus 5.5 or Claude Sonnet 5?
Claude Sonnet 5 is 2.0× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.
Claude Opus 5.5 vs Claude Sonnet 5: which has a bigger context window?
Claude Opus 5.5: 1,000,000 tokens. Claude Sonnet 5: 1,000,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Claude Sonnet 5 ≈ $9,000.
More comparisons
Claude Opus 5.5 vs GLM 5.3 PrimeClaude Opus 5.5 vs Qwen3.8 Max PrimeClaude Opus 5.5 vs Command A+Claude Opus 5.5 vs GPT-6 Luna ProClaude Opus 5.5 vs GPT-6 LunaClaude Opus 5.5 vs GPT-6 Sol ProClaude Opus 5.5 vs GPT-6 SolClaude Opus 5.5 vs MiMo-V2.6-Pro-UltraSpeedClaude Opus 5.5 vs MiMo-V2.6-FlashClaude Opus 5.5 vs Grok 4.7Claude Opus 5.5 vs Qwen3.8 Omni FlashClaude Opus 5.5 vs GLM 5.3 FlashXClaude Opus 5.5 vs DeepSeek V4.1 FlashClaude Opus 5.5 vs GPT-6 AstraClaude Opus 5.5 vs GPT-6 Astra ProClaude Opus 5.5 vs Qwen3.8 Max (0902)Claude Sonnet 5 vs GLM 5.3 PrimeClaude Sonnet 5 vs Qwen3.8 Max PrimeClaude Sonnet 5 vs Command A+Claude Sonnet 5 vs GPT-6 Luna ProClaude Sonnet 5 vs GPT-6 LunaClaude Sonnet 5 vs GPT-6 Sol ProClaude Sonnet 5 vs GPT-6 SolClaude Sonnet 5 vs MiMo-V2.6-Pro-UltraSpeed