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Anthropic: Claude Opus 4.1

anthropic/claude-opus-4.1

Anthropic: Claude Opus 4.1 is a 200,000-token model served on Composite at $18.8 per million tokens in and $93.7 per million tokens out.

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Specifications

Specifications and pricing as served by Composite
Model IDanthropic/claude-opus-4.1
Providercv11
Context window200,000 tokens
Acceptsimage, text, file
Returnstext
Input price$18.8 per million tokens
Output price$93.7 per million tokens
Prompt cachingSupported — cached input is billed at the provider's cache rate, on credits and plans alike
Web search$0.0125 per result
ModeratedYes - by the provider
Cost on a monthly planAbout 195 plan credits per typical call (8k in, 1k out)
Routing endpoints2 (base plus 1 routing variant)

Use Anthropic: Claude Opus 4.1 in JanitorAI or SillyTavern

Make a Composite API key and type anthropic/claude-opus-4.1 as the model name. JanitorAI takes the full URL https://composite.lucidity.sh/v1/chat/completions; SillyTavern, ChubAI, Agnai and RisuAI take https://composite.lucidity.sh/v1. It runs on credits, a plan, or your own provider key.

JanitorAI setup · SillyTavern setup · Best Janitor AI proxies compared

Measured on Composite

This model has not carried enough traffic on Composite yet to publish a success rate, a latency figure or a traffic rank. The numbers appear here once it has.

Routing variants

The same model behind 1 alternative endpoint. Call the id directly to pin a route; the base id above picks for you.

RouteModel IDProviderPrice
cheapThink anthropic/claude-opus-4.1:cheapThink cv11 $18.8 per million tokens input · $93.7 per million tokens output

Pricing

$18.8 per million tokens input · $93.7 per million tokens output

Credits pay the provider’s price plus 25%; cache hits cost less.

On a monthly plan, a typical call (8k tokens in, 1k out) uses about 195 plan credits, at the provider's own price.

Provider

cv11

Roleplay fit

Claude models are widely regarded for nuanced, in-character writing and for following detailed system prompts and character cards closely.

Context behavior

With a 200,000-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.

Cost for regular use

It is priced for quality-sensitive scenes, where writing quality and instruction-following matter more than minimizing per-message cost.

From the provider

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...

Supplied by cv11, not written by Composite.