---
id: "anthropic/claude-opus-4.8"
also: ["anthropic/claude-4.8-opus-20260528", "requesty/anthropic/claude-opus-4-8", "vercel/anthropic/claude-opus-4.8"]
card_usd_per_m: "5.0 in, 25.0 out, at anthropic"
cheapest_list_usd_per_m: "5.0 in, 25.0 out, at amazon-bedrock on openrouter"
cheapest_effective_usd_per_m: "1.045 in, 27.5 out, at bedrock@ap-northeast-1 on requesty"
context: 1000000
max_output: 128000
input: ["text", "image", "file"]
output: ["text"]
released: "2026-05-27"
reasoning: ["max", "xhigh", "high", "medium", "low", "none"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_completion_tokens", "max_tokens", "reasoning", "reasoning_effort", "response_format", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "verbosity"]
endpoints: 28
gateways: "openrouter (12), requesty (12), vercel (4)"
no_training: 27
trains: 0
retains_prompts: 6
coding: 74.3000
agentic: 41.9000
---
# Anthropic: Claude Opus 4.8

Opus 4.8 is the next generation of Anthropic's Opus family, built for long-running, asynchronous agents. Building on the coding and agentic strengths of Opus 4.7, it delivers stronger performance on complex, multi-step tasks and more reliable agentic execution across extended workflows. It is especially effective for asynchronous agent pipelines where tasks unfold over time - large codebases, multi-stage debugging, and end-to-end project orchestration.