Claude Haiku 5.5 (Medium) vs GPT-5.6 Luna (Medium)
Which is better for the money: Claude Haiku 5.5 (Medium) by Anthropic or GPT-5.6 Luna (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Claude Haiku 5.5 (Medium) scores 9.5 points higher (34.5 vs 25.0) but costs 1.3× as much to run the benchmark ($56.4 vs $44.3; mid-range vs budget cost classes). Pick Claude Haiku 5.5 (Medium) when the extra intelligence is worth the premium, otherwise GPT-5.6 Luna (Medium).
| Metric | Claude Haiku 5.5 (Medium) | GPT-5.6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.5 | 25.0 | −27.5% GPT-5.6 Luna (Medium) is 27.5% less intelligent |
| Total AA cost (lower is better) | $56.36 | $44.32 | −21.4% GPT-5.6 Luna (Medium) is 21.4% cheaper |
| End-to-end time (lower is better) | 14.74s | 6.50s | −55.9% GPT-5.6 Luna (Medium) is 55.9% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (Medium) vs Claude Haiku 5.5 (Medium): 27.5% less intelligence, 21.4% less cost to run the AA benchmark, and 55.9% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Haiku 5.5 (Medium) is on today's frontier: nothing is both smarter and cheaper.
- GPT-5.6 Luna (Medium) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
Claude Haiku 5.5 (Medium)GPT-5.6 Luna (Medium)Today's Pareto frontierEvery other model
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