Anthropic's Fable 5 resurfaces in Claude Code v2.1.190 strings, Bedrock catalog 🧵

Leaked code in Claude Code version 2.1.190 contains new UI strings pointing to a return of Anthropic's Fable 5 model bundled directly into subscription plans with weekly usage caps, according to a Tuesday post by X user @synthwavedd. One newly added line reads, "You've used your included Fable 5 usage for this week. Continuing on Fable 5 uses usage credits," and the leaker noted that the phrase "purchased separately from your plan" appears to have been removed from the codebase.

Decrypt independently verified the strings by downloading the macOS Apple Silicon Claude Code package from npm via npm pack @anthropic-ai/claude-code-darwin-arm64@2.1.190, extracting the tarball, and running strings -a on the bundled package/claude binary, where the updated Fable 5 copy was present. Fable 5 was first released publicly as part of Anthropic's Mythos-class line, then pulled on June 12 after the Trump administration issued an emergency export control directive citing a jailbreak vulnerability. Anthropic complied with the order but disputed the severity of the finding, arguing that any model on the market could replicate the same vulnerability.

Separate signals support the timeline. A second X account, @bridgemindai, posted on June 24 that Fable 5 has appeared in the Amazon Bedrock model catalog with Anthropic listed as the seller, and Bedrock documentation continues to reference Claude Fable 5 across its listings. Neither Bedrock model listings nor code strings constitute a launch date, and product copy is routinely written months ahead of any public release.

For now, Anthropic has not publicly confirmed a relaunch date or pricing structure for Fable 5, and the weekly usage framework implied by the leaked strings has not been detailed in any official announcement.