Model dossier

Anthropic: Claude Opus 4.8 (Fast)

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

ProviderAnthropic Start comparison

Context1,000,000

Max output128,000

Pricing viewTVP price

Identity

Anthropic: Claude Opus 4.8 (Fast)

Model ID: anthropic/claude-opus-4.8-fast
Canonical slug: anthropic/claude-4.8-opus-fast-20260528
Knowledge cutoff: n/a
Created: 5/27/2026

Capabilities

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Modalities

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Capacity

Context1,000,000

Max output128,000

TokenizerClaude