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  1. Home
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  3. Compare

Claude Sonnet 5 vs Claude Sonnet 5.5

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.

Favicon for anthropic
Claude Sonnet 5
Favicon for anthropic
Claude Sonnet 5.5
Favicon for anthropic
Claude Sonnet 5
Favicon for anthropic
Claude Sonnet 5.5

Overview

Claude Sonnet 5
Author
Anthropic
Claude Sonnet 5.5
Author
Anthropic
Claude Sonnet 5
Context length
1Mtokens
Claude Sonnet 5.5
Context length
1Mtokens
Claude Sonnet 5
Reasoning
Claude Sonnet 5.5
Reasoning
Claude Sonnet 5
Input modalities
Claude Sonnet 5.5
Input modalities
Claude Sonnet 5
Output modalities
Claude Sonnet 5.5
Output modalities

Claude Sonnet 5 vs Claude Sonnet 5.5: side-by-side summary

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.

Context window
  • Claude Sonnet 5: 1,000,000 tokens
  • Claude Sonnet 5.5: 1,000,000 tokens
Price
  • Claude Sonnet 5: $2/M tokens input, $10/M tokens output
  • Claude Sonnet 5.5: $2/M tokens input, $10/M tokens output
Provided by
  • Claude Sonnet 5: Anthropic
  • Claude Sonnet 5.5: Anthropic
  • model details, providers and pricing
Claude Sonnet 5
model details, providers and pricing
Claude Sonnet 5.5

Claude Sonnet 5 vs Claude Sonnet 5.5 at a glance

Claude Sonnet 5 vs Claude Sonnet 5.5 comparison
Claude Sonnet 5Claude Sonnet 5.5
Input price$2/M tokens$2/M tokens
Output price$10/M tokens$10/M tokens
Context window1,000,000 tokens1,000,000 tokens
Intelligence Index34.456.0
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)2.23 s2.93 s
Throughput (p50)75.0 tok/s109.0 tok/s

Oct 5, 2026

Is Claude Sonnet 5 cheaper than Claude Sonnet 5.5?

Claude Sonnet 5 and Claude Sonnet 5.5 cost the same on OpenRouter: $2/M tokens input and $10/M tokens output.

Which has the longer context window, Claude Sonnet 5 or Claude Sonnet 5.5?

Claude Sonnet 5 and Claude Sonnet 5.5 have the same context window of 1,000,000 tokens.

Which is faster, Claude Sonnet 5 or Claude Sonnet 5.5?

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.

Attribute
Benchmark data updated
Frequently asked questions