---
title: "Anthropic: Claude Opus 4.8 (Fast) — price, capability and what beats it · Undominated.ai"
canonical: https://undominated.ai/models/anthropic__claude-opus-4.8-fast/
description: "Anthropic: Claude Opus 4.8 (Fast): $10.00/M in, $50.00/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper."
---

# Anthropic: Claude Opus 4.8 (Fast) — price, capability and what beats it · Undominated.ai

> Anthropic: Claude Opus 4.8 (Fast): $10.00/M in, $50.00/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper.

[Leaderboard](/) / Anthropic

# Claude Opus 4.8 (Fast)

Anthropic · released 2026-05-27

 $20.00 per million tokens, balanced Balanced Summarise Chat Code gen Agentic

## No independent quality score.

No benchmark we track has measured this model. That is not the same as measuring it and finding it wanting — we simply cannot rank it, so we do not.

### Every price dimension

| Input | $10.00 /M |
| --- | --- |
| Output | $50.00 /M |
| Cached input | $1.00 /M |
| Cache write | $12.50 /M |
| Cache write 1h | $20.00 /M |
| Web search | $0.01 /call |

### Independent scores

No independent benchmark has measured this model.

### Capability

| Context window | 1M |
| --- | --- |
| Max output | 128K |
| Input modes | text, image, file |
| Tool use | yes |
| Reasoning | optional |

### Provenance

| Price source | openrouter.ai |
| --- | --- |
| Fetched | 2026-08-24 |
| Quality data | unrated |

Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode