Claude Opus 5 (Fast)

Anthropic · Released July 2026

Fast-mode variant of [Opus 5](/anthropic/claude-opus-5) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

It belongs to Anthropic's Claude family: Opus is the deep-capability tier, Sonnet balances quality and speed, Haiku is the light tier, and Fast servings trade some depth for latency.

Facts and pricing

Provider

Anthropic

Context window

1M tokens

Input price

110 credits / 1M tokens ($10.00 raw)

Output price

550 credits / 1M tokens ($50.00 raw)

Vision (image input)

Yes

Tool calling

Yes

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.10x margin. Raw prices shown per 1M tokens.

Try Claude Opus 5 (Fast) now

What Claude Opus 5 (Fast) is best for

• Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
• Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
• Working with images: screenshots, charts, photos and scanned documents alongside text
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a frontier model like Claude Opus 5 (Fast):

• Review this business plan and give me the three hardest questions an investor would ask
• Rewrite this announcement so it lands with both engineers and executives
• I am choosing between two job offers, help me think through the tradeoffs
• Draft a technical design doc for a rate limiter, including failure modes

Anthropic family

All 28 Anthropic models

Frequently asked questions

What is Claude Opus 5 (Fast)?

Claude Opus 5 (Fast) is an AI model by Anthropic. Fast-mode variant of [Opus 5](/anthropic/claude-opus-5) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

How much does Claude Opus 5 (Fast) cost on Zeplik?

Input tokens cost 110 credits per million and output tokens 550 credits per million (1 credit = $0.10; the raw provider rates are $10.00 and $50.00 per million). New accounts start with free credits.

How long can a conversation with Claude Opus 5 (Fast) be?

Claude Opus 5 (Fast) has a 1M-token context window (1,000,000 tokens), which covers the conversation plus any documents you attach.

Does Claude Opus 5 (Fast) support images and tools?

Claude Opus 5 (Fast) accepts image input and supports tool calling.

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