Claude Opus 4.6 (Fast)
Anthropic Claude Opus 4.6 (Fast) — pricing, 1000k context window, API cost calculator and alternatives.
By Anthropic
Specs
- Provider
- Anthropic
- Slug
- anthropic/claude-opus-4-6-fast
- Capabilities
- vision, tools, json_mode
Pricing freshness
- Tier
- standard
- Currency
- USD
- As of
- 2026-05-08 17:08 UTC
Pricing history
Tracking Claude Opus 4.6 (Fast) pricing since 2026-05-08. We'll plot the chart here once it changes.
Quickstart — call Claude Opus 4.6 (Fast) from your app
curl https://api.anthropic.com/v1/messages \
-H "Content-Type: application/json" \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-d '{
"model": "claude-opus-4-6-fast",
"max_tokens": 1024,
"messages": [{"role": "user", "content": "Hello!"}]
}'Official docs: https://docs.anthropic.com/en/api/messages
# pip install anthropic
from anthropic import Anthropic
client = Anthropic() # reads ANTHROPIC_API_KEY from env
resp = client.messages.create(
model="claude-opus-4-6-fast",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.content[0].text)Official docs: https://docs.anthropic.com/en/api/messages
// npm install @anthropic-ai/sdk
import Anthropic from "@anthropic-ai/sdk";
const client = new Anthropic(); // reads ANTHROPIC_API_KEY from env
const resp = await client.messages.create({
model: "claude-opus-4-6-fast",
max_tokens: 1024,
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.content[0].text);Official docs: https://docs.anthropic.com/en/api/messages
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Frequently asked questions
What is Claude Opus 4.6 (Fast)?
Claude Opus 4.6 (Fast) is a large language model API from Anthropic with a 1M-token context window. It costs $30 per 1M input tokens and $150 per 1M output tokens.
How much does Claude Opus 4.6 (Fast) cost?
Claude Opus 4.6 (Fast) is priced at $30 per 1M input tokens and $150 per 1M output tokens via the Anthropic API. A 50/50 input/output workload of 1M total tokens costs about $90.
What is the context window of Claude Opus 4.6 (Fast)?
Claude Opus 4.6 (Fast) supports up to 1M tokens of context per request — roughly 2000 pages of English text or 125000 lines of code at a typical density.
Does Claude Opus 4.6 (Fast) support vision, tool use, or JSON mode?
Claude Opus 4.6 (Fast) supports vision, tool/function calling, and structured JSON mode.
Who makes Claude Opus 4.6 (Fast)?
Claude Opus 4.6 (Fast) is built and operated by Anthropic. Pricing, context window, and capabilities on this page are refreshed nightly from Anthropic's public catalog.
Can I self-host Claude Opus 4.6 (Fast)?
Claude Opus 4.6 (Fast) is API-only — its weights are not publicly distributed by Anthropic, so it cannot be self-hosted today.