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Put models side by side on price, context, capabilities, and benchmarks.
GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series (1.05M-token context, text, image, and file input, $2/$10 per million input/output tokens), released September 22, 2026 between the flagship GPT-6 Astra and the fast GPT-6 Luna. OpenAI reports it makes about half as many factual mistakes as GPT-5.6 Sol, reaching Astra-level reliability for everyday agentic coding and professional work at much lower cost.
Claude Opus 5.5 is Anthropic's flagship model released September 22, 2026 as the first of the Claude 5.5 family, with a 1M-token context window, text, image, and file input, and pricing of $4/$20 per million input/output tokens. Anthropic says it performs at the level of Claude Fable 5.1 on most work while costing about 40% less to run than Opus 5, and it leads on agentic coding, multi-step changes in large codebases, and long-horizon knowledge work.
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
Claude Opus 5.5 (Max, Default Fallback)Claude Sonnet 5.5 (Max, Default Fallback)
