FrontierThe story, in brief
GPT-5.6 Sol nearly matches Fable 5 on aggregated benchmarks at one-third the cost
59 points vs 60 points. GPT-5.6 Sol just undercut Anthropic's Fable 5 by 67% on price.
The KeyNews take
Why it matters
OpenAI's latest model nearly matches Claude's flagship on benchmarks while pricing it out—a direct competitive play that forces Anthropic into margin compression or positioning retreat.
The key facts
5 to knowGPT-5.6 Sol scores 59 on Artificial Analysis Intelligence Index
Claude Fable 5 scores 60 on same index
GPT-5.6 Sol costs $1.04 per task vs Fable 5 at ~$3.12 per task (67% cheaper)
GPT-5.6 Sol leads competitors in agentic coding benchmarks
Published July 9, 2026
Go to the source
The Decoderthe-decoder.com
Publisher excerpt: OpenAI's GPT-5.6 Sol scores 59 points on the Artificial Analysis Intelligence Index, just one point behind Claude Fable 5. At $1.04 per task, it costs a third of what Anthropic's top model charges. In agentic coding, Sol beats every competitor, adding even more pricing pressure on Anthropic.