---
title: "Claude Opus 5.5 — LLM-TEST.com"
url: /models/claude-opus-5-5/
canonical_url: https://llm-test.com/models/claude-opus-5-5/
language: en
type: model
summary: "A deep-reasoning and agentic-coding specialist that trades a little of Fable's polish for a stronger price-to-capability ratio. The go-to Claude model for engineering teams running autonomous coding agents."
last_updated: "2026-11-05"
---

# Claude Opus 5.5

_Anthropic · Reasoning_

A deep-reasoning and agentic-coding specialist that trades a little of Fable's polish for a stronger price-to-capability ratio. The go-to Claude model for engineering teams running autonomous coding agents.

## At a glance

- Released: Sep 15, 2026
- Provider: Anthropic
- Context window: 1,000,000 tokens
- Max output: 128,000 tokens
- Modalities: Text + image → text
- Knowledge cutoff: June 2026
- API model ID: `claude-opus-5-5`
- License: Proprietary (API only)

## Pricing

- Standard: $4 input / $20 output per 1M tokens
- Batch: $2 input / $10 output per 1M tokens
- Example: a 1,500-token prompt + 650-token answer ≈ $0.019 (standard)

## What's new vs Claude Opus 5 (April 2026)

- Better sustained performance on long agentic coding tasks
- Improved step-by-step reasoning and self-correction
- More efficient token use on extended runs
- Still pricier than the Sonnet workhorse tier

## Best use cases

- **Agentic coding** — Plans and edits across large codebases with many tool calls.
- **Complex reasoning** — Works through multi-step technical and analytical problems.
- **Research assistance** — Synthesizes long documents into structured conclusions.

## Strengths

- Strong agentic coding
- Deep reasoning
- Good cost-to-capability
- Reliable long runs

## Limitations

- Costlier than balanced tiers
- Overkill for simple tasks

## Where to get access

- Consumer app: Claude apps (web, macOS, Windows, iOS, Android) — https://claude.ai
- API: the Anthropic Console — https://console.anthropic.com
- Also available: Amazon Bedrock and Google Vertex AI
- Docs: https://docs.anthropic.com

Full comparison and live pricing: https://llm-test.com/ · directory: https://llm-test.com/models/