LLM
GA
Proprietary
Claude Opus 5.5
Repo-scale coding and long agentic sessions
Release2026-09-22
Context1M
Max output128,000 tokens
ParametersUndisclosed
Local / VRAMAPI only
LicenseProprietary
Overview
Claude Opus 5.5 is a model in the LLM category from Anthropic. It was released in 2026-09-22. The vendor is based in US. Best for: Repo-scale coding and long agentic sessions.
Strengths
- Very strong code understanding and refactoring
- 1M context
- Less restricted than Fable
Limits
- Not as top-tier as Fable
- No image output
Specifications
| Vendor | Anthropic |
|---|---|
| Category | LLM |
| Release | 2026-09-22 |
| Status | GA |
| License | Proprietary |
| Commercial use | Not specified |
| Context window | 1M |
| Max output tokens | 128,000 |
| Input modalities | Text, Image |
| Output modalities | Text |
| Prompt types | Text |
| Negative prompts | No |
| Max outputs | 1 |
| Local deployment | No |
| API access | Yes |
| Pricing | $5 / $25 per 1M token |
| Confidence | High |
| Vendor country | US |
| Vendor type | Frontier lab |
Pricing & hardware
$5 / $25 per 1M token
API-only: local GPU memory is not applicable. API access is available.