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Claude Opus 5.5: Fable 5.1 Performance at 40% Less
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Claude Opus 5.5: Fable 5.1 Performance at 40% Less

Claude Opus 5.5 matches Fable 5.1 performance at about 40% less cost. Here are the benchmarks, per-task pricing, and which effort level to actually use.

5 GPT-6 Astra Mistakes Killing Your Results (And Fixes)
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5 GPT-6 Astra Mistakes Killing Your Results (And Fixes)

GPT-6 Astra is the best model we've seen, but most people are hamstringing it. Here are the five mistakes killing your Astra results and exactly how to fix each one.

GPT 6 Astra vs Claude Fable 5.1: Real Tests
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GPT 6 Astra vs Claude Fable 5.1: Real Tests

I ran GPT 6 Astra and Claude Fable 5.1 head-to-head on four real builds — a Fortnite clone, a landing page, motion graphics, and a 3D globe dashboard. Here's who actually won, and why the benchmarks only tell half the story.

GPT-6 Astra vs Fable 5.1: What Actually Matters
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GPT-6 Astra vs Fable 5.1: What Actually Matters

OpenAI's GPT-6 Astra matches or beats Anthropic's Fable 5.1 on most benchmarks at a lower price. Here's what actually matters for people who build with these models.