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Long context

Claude Fable 5.1 API pricing

Anthropic's Claude series — long context, dependable tool calling, and the native models behind Claude Code.

Model IDanthropic/claude-fable-5.1
ChatStreamingTool callingVision
Get API KeyRun your first request

Call summary

Input
$10.00$6.00/ 1M tokens
Cache write $7.50
Cache read $0.60
Output
$50.00$30.00/ 1M tokens
Context Window
1.05M
API Endpoints
2

Claude Fable 5.1 API endpoints

One API key — call this model through any of the 2 endpoints below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model
Chat Completions reference
POST/v1/messagesAnthropic-native · Native for Claude Code
Messages API reference

Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

Successful response share

94.62%

Success 2xx

94.62%

Rate limit 429

0.00%

Server 5xx

5.38%

TPS

107.83

tokens/s
Avg. time to first token

15.75 s

Avg. latency

24.62 s

Includes production requests ending in 2xx, 429, or 5xx. Average latency uses successful requests; time to first token and TPS require complete observations from successful streams. Public thresholds are 100 requests and 5 independent principals.

Updated Oct 20, 2026, 6:21 AM UTC

More Claude models on Router One

29 other Claude models on the same gateway and API key — each page lists endpoints, posted price, and context window.

Claude Fable 5$8.00 in / $40.00 out per 1M1.05M contextClaude Haiku 4.5$0.30 in / $3.00 out per 1M200K contextClaude Haiku 5.5$0.06 in / $0.30 out per 1M1.05M contextClaude Opus 4.6$2.25 in / $11.25 out per 1M1.05M contextClaude Opus 4.6 (thinking)$2.25 in / $11.25 out per 1M1.05M contextClaude Opus 4.7 (thinking)$2.25 in / $11.25 out per 1M1.05M contextClaude Opus 4.8$2.25 in / $11.25 out per 1M1.05M contextClaude Opus 5$2.25 in / $11.25 out per 1M1.05M contextClaude Opus 5.5$2.40 in / $12.00 out per 1M1.05M contextClaude Sonnet 4.6$0.90 in / $4.50 out per 1M1.05M contextClaude Sonnet 4.6 (thinking)$0.90 in / $4.50 out per 1M1.05M contextClaude Sonnet 5$0.90 in / $4.50 out per 1M1.05M contextClaude Sonnet 5.5$1.20 in / $6.00 out per 1M1.05M context
16 channel versions
Claude Haiku 4.5 · AWS$1.00 in / $5.00 out per 1M200K contextClaude Opus 4.5 · AWS$5.00 in / $25.00 out per 1M200K contextClaude Opus 4.6 · AWS$5.00 in / $25.00 out per 1M1M contextClaude Opus 4.7 · AWS$5.00 in / $25.00 out per 1M1M contextClaude Opus 4.8 · AWS$5.00 in / $25.00 out per 1M1M contextClaude Opus 5 · AWS$5.00 in / $25.00 out per 1M1M contextClaude Sonnet 4.5 · AWS$3.00 in / $15.00 out per 1M200K contextClaude Sonnet 4.6 · AWS$3.00 in / $15.00 out per 1M1M contextClaude Sonnet 5 · AWS$2.00 in / $10.00 out per 1M1M contextClaude Opus 4.6 · Vertex$5.00 in / $25.00 out per 1M1M contextClaude Opus 4.7 · Vertex$5.00 in / $25.00 out per 1M1M contextClaude Opus 4.8 · Vertex$5.00 in / $25.00 out per 1M1M contextClaude Opus 5 · Vertex$5.00 in / $25.00 out per 1M1M contextClaude Sonnet 4.5 · Vertex$3.00 in / $15.00 out per 1M200K contextClaude Sonnet 4.6 · Vertex$3.00 in / $15.00 out per 1M1M contextClaude Sonnet 5 · Vertex$2.00 in / $10.00 out per 1M1M context

Claude Fable 5.1 at a glance

Claude Fable 5.1 (model ID anthropic/claude-fable-5.1) is a Claude-series text model on Router One. Posted rate: $6.00 in / $30.00 out per 1M tokens (was $10.00 in / $50.00 out). No Router One subscription plan includes Claude Fable 5.1 today; every call bills the wallet at its posted rate. Context window: 1.05M tokens. Accepts text, image; returns text. Endpoints: POST /v1/chat/completions (OpenAI-compatible), POST /v1/messages (Anthropic-native, the Claude Code path).

Claude Fable 5.1 FAQ

How much does Claude Fable 5.1 cost on Router One?

Claude Fable 5.1 is billed per token on Router One: $6.00 in / $30.00 out per 1M tokens, pay as you go.

Is Claude Fable 5.1 included in Router One subscriptions?

No Router One subscription plan includes Claude Fable 5.1 today; every call bills the wallet at its posted rate.

Which endpoints serve Claude Fable 5.1?

Claude Fable 5.1 is served on 2 endpoints — POST /v1/chat/completions (OpenAI-compatible), POST /v1/messages (Anthropic-native, the Claude Code path). The same Router One API key works on each.

What is Claude Fable 5.1's context window?

Claude Fable 5.1 accepts up to 1.05M tokens of context per request on Router One.

Start using Claude Fable 5.1

Create an API key and call Claude Fable 5.1 at $6.00 in / $30.00 out per 1M tokens on Router One — pay as you go, with per-request cost and latency visibility.

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