---
id: "anthropic/claude-opus-4.1"
also: ["anthropic/claude-4.1-opus-20250805", "requesty/anthropic/claude-opus-4-1"]
cheapest_list_usd_per_m: "13.5 in, 67.5 out, at anthropic on requesty"
cheapest_effective_usd_per_m: "7.1771 in, 75.0 out, at vertex on requesty"
context: 200000
max_output: 32000
input: ["image", "text", "file"]
output: ["text"]
released: "2025-08-05"
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_tokens", "reasoning", "stop", "temperature", "tool_choice", "tools", "top_k", "top_p"]
endpoints: 5
gateways: "requesty (3), openrouter (2)"
no_training: 5
trains: 0
retains_prompts: 1
---
# Anthropic: Claude Opus 4.1

Anthropic's most intelligent model. The first hybrid reasoning model on the market with the highest level of intelligence and capability with toggleable extended thinking. Top-tier results in reasoning, coding, multilingual tasks, long-context handling, honesty, and image processing.