Claude Opus 4.5 (Reasoning) vs GPT-5.5 Instant (June 2026)
Claude Opus 4.5 (Reasoning) vs GPT-5.5 Instant (June 2026). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
Verdict
Comparison incomplete
A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
| Metric | Claude Opus 4.5 (Reasoning) | GPT-5.5 Instant (June 2026) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.1 | 26.0 | −10.7% GPT-5.5 Instant (June… is 10.7% less intelligent |
| Total AA cost (lower is better) | Not reported | $986.85 | — not comparable |
| End-to-end time (lower is better) | 22.66s | 16.68s | −26.4% GPT-5.5 Instant (June… is 26.4% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-4-5-thinking/gpt-5-5-instant-06-26 · Markdown: /api/v1/compare/claude-opus-4-5-thinking/gpt-5-5-instant-06-26?format=md · llms.txt · agent skill