Uploaded September 2026 | Updated September 2026, 2 hours ago

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GPT-6 Astra, GPT-5.6 Sol, and Claude Fable 5.1 now occupy very different value lanes. This comparison covers official API pricing, context and output limits, knowledge cutoffs, agent features, vendor-benchmark caveats, and cyber-safety/access realities—then gives you a practical routing strategy.

Important corrections:
- Anthropic’s public API list price for Fable 5.1 is $10/$50 per million input/output tokens—the same input/output ticket it states for Fable 5, with cheaper cache reads.
- Marcelo’s pentest refusal is a first-person experience. Public documentation supports cyber-safety fallbacks, but does not establish that being Canadian caused the refusal.

Chapters:
00:00 Which model should you choose?
00:33 Token economics
01:08 Context and cutoffs
02:03 Per-task cost
02:19 Refusals and access
02:54 The practical stack
03:24 Same price, different value

Official sources:
- GPT-6 Astra announcement: openai.com/index/gpt-6-astra
- GPT-6 Astra model page: developers.openai.com/api/docs/models/gpt-6-astra
- OpenAI model catalog: developers.openai.com/api/docs/models/gpt
- Fable 5.1 model overview: platform.claude.com/docs/en/models/fable-5-1/overview
- Fable cyber-safety model switching: support.claude.com/en/articles/15363606-why-claude-switched-models-in-your-conversation-with-fable-5-or-fable-5-1
- Supported countries and regions: support.claude.com/en/articles/8461763-where-can-i-access-claude
- July 1 access restoration: anthropic.com/news/redeploying-fable-5

Disclosure: synthetic narration (Fish Audio Ethan, s2-pro, speed 1.1374) and designed graphics. Benchmark cost figures are vendor-reported and configuration-specific.

#GPT6 #AIModels #Fable51