Claude Fable 5 Is Back: Pricing and Benchmarks
Claude Fable 5 returns after a US export-control suspension. Here is the $10/$50 pricing, the SWE-Bench Pro and FrontierCode scores, and what it means.
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Model releases, capability comparisons and rigorous analysis of the benchmarks used to rank them.
Claude Sonnet 5: Pricing, Benchmarks, and Cost
Claude Sonnet 5 ships at $3/$15 per million tokens, intro $2/$10 through August 2026. What changed versus Sonnet 4.6 and Opus 4.8, and the cost per task.
DeepSWE vs FrontierCode: Two Ways to Grade AI Code
DeepSWE grades whether an AI finishes the task. FrontierCode grades whether you would merge its code. Why the same model scores 59% and 13%.
Did OpenAI Cut Prices? GPT-5.6 Sol, Terra, Luna
OpenAI did not cut AI prices with GPT-5.6. Sol holds at $5/$30, Terra and Luna undercut it, but the cheapest output floor rose from $1.25 to $6.
GPT-5.6 Sol on Cerebras: 750 Tokens per Second
GPT-5.6 Sol goes live on Cerebras at up to 750 tokens per second in July. Here is what that speed actually means, and why it is a chip story.
GPT-5.6 Sol, Terra and Luna: What OpenAI Launched
OpenAI launched GPT-5.6 on June 26 as three tiers: Sol, Terra and Luna. Here are the confirmed prices, the benchmarks, and the government access catch.
GPT-5.6 Delayed: The Government Is Now a Release Gate
The Trump administration asked OpenAI to stagger GPT-5.6 and approve users one by one. A federal gate now sits between a finished AI model and the public.
Benchmark Contamination in AI: When Tests Leak Into Training
Benchmark contamination is when test answers leak into training data and inflate AI scores. How it happens, how much it distorts results, and how to spot it.
GPT-5.6 Preview: The Leak Is Real, the Release Date Isn't
A leaked gpt-5.6-preview route lit up r/OpenAI, then GPT-5.6 launched June 26 as Sol, Terra and Luna in a government-gated preview. The signal vs the hype.