Compare Claude Sonnet 5 from Anthropic and Claude Sonnet 5.5 from Anthropic on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Claude Sonnet 5 and Claude Sonnet 5.5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Sonnet 5, from Anthropic, has a 1,000,000-token context window and is priced at $2/M tokens input, $10/M tokens output on OpenRouter.
Claude Sonnet 5.5, from Anthropic, has a 1,000,000-token context window and is priced at $2/M tokens input, $10/M tokens output on OpenRouter.
| Claude Sonnet 5 | Claude Sonnet 5.5 | |
|---|---|---|
| Input price | $2/M tokens | $2/M tokens |
| Output price | $10/M tokens | $10/M tokens |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Intelligence Index | 34.4 | 56.0 |
| Coding Index | Not available | Not available |
| Agentic Index | Not available | Not available |
| Latency (p50) | 2.23 s | 2.93 s |
| Throughput (p50) | 75.0 tok/s | 109.0 tok/s |
Claude Sonnet 5 and Claude Sonnet 5.5 cost the same on OpenRouter: $2/M tokens input and $10/M tokens output.
Claude Sonnet 5 and Claude Sonnet 5.5 have the same context window of 1,000,000 tokens.
Claude Sonnet 5.5 is faster on OpenRouter, generating a median 109.0 tokens per second compared with 75.0 tokens per second for Claude Sonnet 5.