Anthropic unveiled its Opus 5.5 model, delivering coding and knowledge work performance that rivals its larger Fable model at a lower cost.

Anthropic announced the launch of Opus 5.5, a new language model that promises the same coding and knowledge‑work capabilities as its flagship Fable series while cutting operational costs for developers.

What’s new in Opus 5.5

The updated model builds on the architecture of Opus 5, adding refined training data and efficiency tweaks that allow it to handle complex programming tasks, code generation, and detailed reasoning with speed comparable to the larger Fable models.

According to Anthropic, Opus 5.5 delivers a 30% reduction in per‑token pricing compared with its predecessor, making it a more attractive option for enterprises and independent developers seeking high‑quality output without the premium price tag.

Performance versus Fable

Independent benchmarks released by Anthropic show Opus 5.5 matching Fable‑level performance on standard coding suites such as HumanEval and MBPP, while maintaining lower latency on typical knowledge‑work queries.

In head‑to‑head tests, Opus 5.5 achieved similar accuracy scores to Fable‑2 on code synthesis tasks, but with a 15% faster response time on average, highlighting the model’s optimized inference pipeline.

Pricing and availability

Anthropic is rolling out Opus 5.5 on its API platform immediately, with tiered pricing that starts at $0.0008 per 1,000 tokens for the base tier, down from $0.0012 for Opus 5. Existing enterprise contracts can upgrade to the new model at no additional integration cost.

  • Lower per‑token cost than Opus 5
  • Performance on par with Fable‑2 for coding tasks
  • Faster inference latency
  • Seamless API compatibility with existing Anthropic integrations
Opus 5.5 gives developers the power of our most capable model without the premium price barrier, opening up new possibilities for AI‑assisted software development.

The release comes as competition in the large‑language‑model market intensifies, with rivals also pushing for more cost‑effective solutions for enterprise workloads.

For a full rundown of Anthropic’s announcement, see the TechCrunch coverage of Anthropic’s Opus 5.5 launch.