Claude Mythos 5 128K 1M Mythos-class (restricted); $10.00 / $50.00; released 2026-06-09 GPT-4.1 ⭐ 128K 1M Knowledge cutoff June 2024; $2.00 / $8.00; retired from ChatGPT Feb 13, 2026; API still ...

OpenAI moved GPT-5.6 to general availability on July 9, 2026, shipping three tiers instead of one model. Sol is $5/$30 per 1M tokens, Terra is $2.50/$15, and Luna is $1/$6. Sol sets the Artificial ...

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Agentic LLMs keep failing the same way because they lack specific, reusable capabilities. Stanford's TRACE diagnoses those gaps from an agent's own trajectories, synthesizes one verifiable training ...