Claude Haiku 5.5 (High) vs GPT-5.6 Luna (Medium)
Which is better for the money: Claude Haiku 5.5 (High) 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 (High) scores 12.8 points higher (37.8 vs 25.0) but costs 2.1× as much to run the benchmark ($94.1 vs $44.3; mid-range vs budget cost classes). Pick Claude Haiku 5.5 (High) when the extra intelligence is worth the premium, otherwise GPT-5.6 Luna (Medium).
| Metric | Claude Haiku 5.5 (High) | GPT-5.6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.8 | 25.0 | −33.9% GPT-5.6 Luna (Medium) is 33.9% less intelligent |
| Total AA cost (lower is better) | $94.07 | $44.32 | −52.9% GPT-5.6 Luna (Medium) is 52.9% cheaper |
| End-to-end time (lower is better) | 29.47s | 6.64s | −77.5% GPT-5.6 Luna (Medium) is 77.5% 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 (High): 33.9% less intelligence, 52.9% less cost to run the AA benchmark, and 77.5% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Haiku 5.5 (High) 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 (High)GPT-5.6 Luna (Medium)Today's Pareto frontierEvery other model
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