Claude Opus 4.8
Anthropic Claude model release target
Requested Anthropic Claude model release target named "Claude Opus 4.8"; not directly verified from accessible first-party sources.
Pricing
Regular usage pricing from Anthropic’s official pricing page. The same page also lists 1h cache writes at $10/MTok and cache hits & refreshes at $0.50/MTok; fast mode is separate at $10/MTok input and $50/MTok output.
Anthropic’s first-party pricing docs list Claude Opus 4.8 at $5 per million input tokens and $25 per million output tokens, with 5m prompt-cache writes at $6.25 per million tokens. Anthropic’s launch post states Opus 4.8 is available at the same price as Opus 4.7, and also notes a separate fast mode priced at $10/$50 per million input/output tokens.
Model Intelligence
Recent stories
Anthropic said a US government directive forced it to disable Fable 5 and Mythos 5 across Claude products and APIs. The change also pushed Build Day and downstream tooling to Opus 4.8, breaking active Fable sessions and triggering fallbacks in tools like Linear Agent.
Anthropic said flagged Fable 5 requests will now visibly fall back to Opus 4.8, and API refusals will return reasons instead of silently degrading output. The update matters because users were reporting sudden quality drops, opaque refusals, and quota-burn confusion around Mythos-class safeguards.
Creators shared browser-game workflows that pair Magnific asset generation or single Claude prompts with playable HTML demos. The examples matter because they turn vibe-coded mini-games into short, template-driven production recipes rather than one-off experiments.
Fresh Hacker News comments and user posts report 400 errors tied to modified thinking blocks, short cache TTLs, and behavior some testers call a regression from 4.7. The issue matters because the same model is also powering one-prompt sites and games, so quota burn and client breakage are showing up alongside stronger creative output.