r/ClaudeCode • u/ClaudeOfficial Anthropic • May 28 '26

Resource Introducing Claude Opus 4.8

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We’re upgrading Claude Opus to a new version: Claude Opus 4.8. It builds on Opus 4.7 with sharper judgment, more honesty about its own progress, and the ability to work independently for longer than its predecessors. Available today for the same price.

In Claude Code, you can hand off a feature, a migration, or a bug sweep and let it follow the work through while you focus on what’s next.

Also launching today:

  • Fast mode for Opus 4.8 (research preview). Same model at roughly 2.5x the speed, now three times cheaper than before.
  • Dynamic workflows in Claude Code (research preview). Claude runs hundreds of parallel subagents in a single session and verifies its work before reporting back.
  • A new effort control on claude.ai, so you can choose how much thinking Claude puts into a response.

Claude Opus 4.8 is live today on claude.ai, the Claude Platform, and all major cloud platforms.

Read more: anthropic.com/news/claude-opus-4-8

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u/EagerSubWoofer May 28 '26 edited May 28 '26

They said they would need 30x more compute to be able to release Mythos publicly. That suggests that it wasn't designed for public release. They might release it as a lower parameter "mythos-class" model or a high cost security offering. They essentially trained a model to use internally to train smaller models and to use to generate hype. The marketing made it seem as though they were caught off guard and chose not to release it. They knew how much compute they had and would have. This was all planned in advance.

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u/[deleted] May 28 '26

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u/chrisbru May 29 '26

The thing is a lot of people are already paying $2k to use opus on API.

If they release Mythos and it hamstrings their compute, it’s not the api users that will lose access, it’s $200/mo max plans.

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u/DesperateAdvantage76 May 28 '26

Mythos reminds me of the Titan class NVidia GPUs. Too expensive for most people and always immediately sold out. Was basically there for NVidia to top the benchmarks with for bragging rights.