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Claude Opus 5.5 vs GPT 5.6 Luna
Side-by-side comparison of token prices, context windows, and capabilities across official model makers.
| Specification | Claude Opus 5.5 claude-opus-5-5 | GPT 5.6 Luna gpt-5.6-luna |
|---|---|---|
| Official provider | Anthropic | OpenAI |
| Input / 1M | $4$1.40save $2.60 | $0.20$0.07save $0.13 Cheaper |
| Output / 1M | $20$7save $13 | $1.20$0.42save $0.78 Cheaper |
| Context | 1M | 1.05MLarger context |
| Max out | 128K | 128K |
| Capabilities | visiontoolsreasoningcachefile | visiontoolsreasoningcache |
30-day workload (30M input · 80% cached · 3M output) Estimated monthly spend on AivoKey | $63 | $3.36 |
| Model details | Claude Opus 5.5 → | GPT 5.6 Luna → |