OpenRouter Compares Claude Opus, Sonnet and Haiku 5.5
10/30/2026 — 10/30, 09:20·1 sources (all)·1 reports (all)
Key takeaways
- OpenRouter compared Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 on price, benchmarks and 11 coding tasks with hidden tests. All three tiers pa…
- the recommendation is Sonnet 5.5 by default, Haiku 5.5 for high-concurrency and sub-agent work, and Opus 5.5 for long, high-stakes tasks.
Background & analysis
On October 30, 2026, OpenRouter published "Claude Opus vs Sonnet vs Haiku: Which Should You Use?
", a comparison of the three Claude tiers, Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5. OpenRouter evaluated the models on price, benchmarks, 11 coding tasks with hidden tests, and a Claude Code bug fix. Its conclusion was that all three passed everything, so the differences boil down to cost. The recommendation is to use Claude Sonnet 5.5 as the default, Haiku 5.5 for high-volume and sub-agent work, and Opus 5.5 for long tasks where a mistake is costly. Only this single report has been received so far, and OpenRouter has not published detailed scores or data behind the individual tests.
AI-generated from 1 reports · updated 1 day ago
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OpenRouter compared Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 on price, benchmarks, 11 coding tasks with hidden tests and a Claude Code bug fix. All three passed everything, so the differences came down to cost: it recommends Sonnet 5.5 as the default, Haiku 5.5 for high-volume and sub-agent work, and Opus 5.5 for long tasks where mistakes are expensive.
OpenRouterAI score 62
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