GPT-6 Sol vs Claude Opus 5.5: Benchmarks, Specs and Real Costs
GPT-6 Sol offers lower token prices. Claude Opus 5.5 leads the independent benchmark snapshot. Compare effort settings, specs, API costs and practical tradeoffs.
GPT-6 Sol offers lower token prices. Claude Opus 5.5 leads the independent benchmark snapshot. Compare effort settings, specs, API costs and practical tradeoffs.
Research cutoff: September 22, 2026. Prices are US dollars for the direct, paid developer APIs unless stated otherwise. GPT-6 Luna and Gemini…
GPT-6 Sol and Claude Sonnet 5 both list at $2 input and $10 output per million tokens. Compare cache, batch costs, vendor benchmarks, and where each model fits.
OpenAI's GPT-6 Sol ($2/$10) and Luna ($0.10/$0.50) halve GPT-5.6 prices. We break down every benchmark and cost-per-task curve, and how they compare to Claude Opus 5.5, Fable 5.1 and Gemini.
Opus 5.5 launched today. We compared it with GPT-6 Astra and GPT-5.6 Sol on benchmarks, pricing, token usage and cost per task, and flagged where the vendor numbers don't match.
Anthropic's Opus 5.5 lands at $4/$20, claims Fable-level performance for 40% less than Opus 5, and tops the Artificial Analysis index. Here's every spec, benchmark, safety finding and price comparison that matters, plus where the numbers don't hold up.
We tested MiMo-V2.6-Pro in OpenCode: 23 of 23 checks for about 3 cents, matching Claude Opus 5 at $1.03. Here is what is free, every access route, the real pricing and setup for OpenCode and Claude Code.
We tested MiMo-V2.6-Pro against Claude Opus 5 in OpenCode: both passed 23 of 23 checks, at $0.03 vs $1.03. Plus its #1 open-weights Artificial Analysis score, specs, benchmarks and costs vs Claude, GPT, Grok and open models.
An independent group will advise on OpenAI’s AI-generated mathematics. Its powers reveal the larger fight over access, credit, release timing, and accountability.
OpenAI says its internal AI has resolved more than 100 open problems. What happens to research careers when producing a proof no longer proves you understand it?