---
id: "anthropic/claude-opus-4.8-fast"
also: ["anthropic/claude-4.8-opus-fast-20260528", "vercel/anthropic/claude-opus-4.8-fast"]
card_usd_per_m: "10.0 in, 50.0 out, at anthropic"
cheapest_list_usd_per_m: "5.0 in, 25.0 out, at anthropic on vercel"
cheapest_effective_usd_per_m: "4.3713 in, 50.0 out, at anthropic on openrouter"
context: 1000000
max_output: 128000
input: ["text", "image", "file"]
output: ["text"]
released: "2026-05-27"
reasoning: ["max", "xhigh", "high", "medium", "low"]
params: ["include_reasoning", "max_tokens", "reasoning", "reasoning_effort", "response_format", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "verbosity"]
endpoints: 2
gateways: "openrouter (1), vercel (1)"
no_training: 2
trains: 0
retains_prompts: 1
---
# Anthropic: Claude Opus 4.8 (Fast)

Opus 4.8 is a focused upgrade to Opus 4.7 and is Anthropic's best generally available model for coding, agentic tasks, and enterprise workflows. It builds on the strengths of previous Opus models with stronger performance on complex, multi-step coding tasks. Anthropic recommends using it on long-horizon coding and agentic tasks. It is also stronger on professional work, including document drafting, data analysis, and presentations.