Anthropic: Claude Opus 4.6 (Fast)
Analysis Summary
Claude Opus 4.6 Fast is a premium Anthropic variant with a 1M context window, vision, file input, tool use, and function calling. Those capabilities point to long-document analysis, complex coding, agentic workflows, and multimodal client work. The product configuration is operationally attractive for tasks that need substantial context and integrated tools.
Its listed pricing is exceptionally high, especially for output, which makes broad production use difficult unless the task has substantial business value. More importantly, this specific Fast variant has no benchmark results in the supplied data, so its reasoning, coding, and reliability cannot be confirmed independently. Treat it as an experimental premium option, validate it against Opus models with measured results, and reserve deployment for workflows where latency or access characteristics clearly justify the cost.
Assessed September 7, 2026
Editorial notes
Claude Opus 4.6 Fast offers a 1M context window, vision, file handling, tool use, and function calling, but this variant has no model-specific benchmarks and carries exceptionally high listed pricing.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Claude Opus 4.6 Fast offers a 1M context window, vision, file handling, tool use, and function calling, but this variant has no model-specific benchmarks and carries exceptionally high listed pricing.
How Anthropic: Claude Opus 4.6 (Fast) compares
Its 1M-token context window is larger than 81% of the models we list. At $30.00 per million input tokens it is cheaper than 1% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on content. The pulled-in technical corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $30.00 | $0.030000 |
| Output | $150.00 | $0.150000 |
What would Anthropic: Claude Opus 4.6 (Fast) cost your business?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 798 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Anthropic: Claude Opus 4.6 (Fast) for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Anthropic: Claude Opus 4.6 (Fast)
Fast-mode variant of Opus 4.6 - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Frequently asked questions about Anthropic: Claude Opus 4.6 (Fast)
How much does Anthropic: Claude Opus 4.6 (Fast) cost?
Anthropic: Claude Opus 4.6 (Fast) costs $30.00 per million input tokens and $150.00 per million output tokens.
What is the context window of Anthropic: Claude Opus 4.6 (Fast)?
Anthropic: Claude Opus 4.6 (Fast) has a context window of 1,000,000 tokens (1M).
What can Anthropic: Claude Opus 4.6 (Fast) do?
Anthropic: Claude Opus 4.6 (Fast) supports image/vision input, tool use, and function calling.
Who created Anthropic: Claude Opus 4.6 (Fast)?
Anthropic: Claude Opus 4.6 (Fast) is developed by Anthropic and was released on April 7, 2026.