Model releases — News — Frontier Now

Model releases2026-09-27
Anthropic releases Claude Opus 5.5: near Fable 5.1 on most tasks, with API prices cut 20%
Anthropic released Opus 5.5, the first Claude 5.5 model, on September 23. The company says it matches Fable 5.1 on most tasks and costs 40% less per typical task than Opus 5, at $4 input and $20 output per million tokens.
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Model releases2026-09-27
OpenAI releases GPT-6 Sol and Luna at roughly half the previous generation’s API price
On September 23 OpenAI released GPT-6 Sol and GPT-6 Luna, bringing Astra’s training approach to faster, cheaper tiers: Sol costs $2 input and $10 output per million tokens, Luna $0.10 and $0.50.
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