Claude Opus 5.5
Anthropic's first 5.5-family model, matching Claude Fable 5.1 on most work at 40% lower cost.
Overview
Anthropic released Claude Opus 5.5 on September 22, 2026, the first model in its new 5.5 family and the successor to Claude Opus 5. Anthropic says it performs at the level of Claude Fable 5.1 on most work while costing 40% less to run, with output speeds up over 30% versus Opus 5. On benchmarks Anthropic shared, Opus 5.5 surpassed Fable 5.1 on agentic coding, knowledge work, computer use, visual chart recognition, and multidisciplinary reasoning. It is available on AWS, Google Cloud, and Microsoft Azure, and Anthropic has signaled Sonnet 5.5 and Haiku 5.5 will follow within weeks.
This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.
Key features
- Matches Claude Fable 5.1 on most work at roughly 40% lower cost than Opus 5
- Output speed increased over 30% versus Opus 5
- Beats Fable 5.1 on Anthropic's reported agentic coding, knowledge work, computer use, and visual chart recognition benchmarks
- Cache reads priced at $0.20/MTok, a 60% reduction from Opus 5
Use cases
- Cost-sensitive agentic coding and computer-use workloads
- Knowledge work and multidisciplinary reasoning tasks previously requiring Fable-tier pricing
- Cloud-hosted deployment via AWS, Google Cloud, or Microsoft Azure
Pricing
$4/MTok input, $20/MTok output (20% below Opus 5), $0.20/MTok cached reads (60% below Opus 5).
Pricing reflects the source record and may change. Confirm current terms with the provider.
Dates and sources
- Released
- 22 Sept 2026
- Record updated
- 24 Sept 2026
- Record last checked
- 24 Sept 2026