# Claude Sonnet 5.5

> Le Sonnet le plus récent d’Anthropic — successeur de Sonnet 5 au même prix, le meilleur équilibre entre vitesse et intelligence.

Canonical: https://routemux.com/fr/anthropic/claude-sonnet-5-5
Provider: Anthropic

## Key facts

| Field | Value |
| --- | --- |
| Model ID | anthropic/claude-sonnet-5-5 |
| Official model ID | claude-sonnet-5-5 |
| Context window | 1M |
| Max output | 8K |
| Input modalities | text, image |
| Output modalities | text |
| Capabilities | Vision, Reasoning, Tool Calling, Coding, Cache, Paid Cache Write |
| Upstream release | 2026-09-28 |
| Availability | available |

## Pricing

- RouteMux input: $0.56 per 1M tokens
- RouteMux output: $2.8 per 1M tokens
- Official input: $2 per 1M tokens
- Official output: $10 per 1M tokens
- Cache read: $0.056 per 1M tokens
- Cache write: $0.7 per 1M tokens
- Saving vs official: 72%
- Official price source: anthropic_x0.28, verified 2026-09-29

Billing is prepaid wallet, charged per successful request only.

## API access

Base URL: https://api.routemux.com

Supported protocols:

- anthropic_messages

## Other variants in this family

- Claude Sonnet 5 (`anthropic/claude-sonnet-5`)
- Claude Sonnet 4.6 (`anthropic/claude-sonnet-4.6`)