The Agent RaceJuly 9, 2026via The Decoder
GPT-5.6 Sol nearly matches Fable 5 on aggregated benchmarks at one-third the cost
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.
Key signals
- GPT-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
The hook
59 points vs 60 points. GPT-5.6 Sol just undercut Anthropic's Fable 5 by 67% on price.
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.