Claude Opus 5 from Anthropic is now available on AI Gateway.
Opus 5 improves on previous Opus models for long-horizon agentic coding, handling multi-file features, larger refactors, and end-to-end feature work, and completing full tasks rather than leaving stubs or placeholders.
Opus 5 is effective at low and medium effort, which produce quality at a fraction of the tokens and latency of higher settings. Vision is stronger on charts, documents, diagrams, and UI replication, and Opus 5 makes effective use of tools to analyze, crop, and verify visual work. It also coordinates teams of subagents well, which suits multi-agent workflows.
Reasoning is on by default. In AI SDK 7, set the reasoning effort with the top-level reasoning
option, from minimal
up to xhigh
, or none
:
import { streamText } from 'ai';
const result = streamText({ model: 'anthropic/claude-opus-5', prompt: 'Implement the multi-file refactor described in this issue.', reasoning: 'medium',});
Like Fable 5, Opus 5 ships with elevated cybersecurity safeguards, so benign security work can occasionally trigger a safety classifier and get blocked. To add a backstop, use AI Gateway's model fallbacks. List backup models in a models
array under providerOptions.gateway
, and the gateway tries them in order when the primary model fails. The same option works across every AI Gateway API format.
import { streamText } from 'ai';
const result = streamText({ model: 'anthropic/claude-opus-5', prompt: 'Audit this script for vulnerabilities.', providerOptions: { gateway: { models: ['anthropic/claude-opus-4.8', 'anthropic/claude-sonnet-5'], }, },});
Opus 5 is compatible with Zero Data Retention.
Copy link to headingFast mode
To enable fast mode, pass speed: 'fast'
in the anthropic
provider options in AI SDK:
import { streamText } from "ai";
const { text } = await streamText({ model: 'anthropic/claude-opus-5', prompt, providerOptions: { anthropic: { speed: 'fast', }, },});
Copy link to headingProviders and endpoints
Opus 5 can be served by more than one provider. To see every provider serving it, along with per-provider pricing, supported parameters, uptime, throughput, and latency, call the model endpoints API:
curl https://ai-gateway.vercel.sh/v1/models/anthropic/claude-opus-5/endpoints \ -H "Authorization: Bearer $AI_GATEWAY_API_KEY"
Copy link to headingUse Opus 5 in your coding agent
Route your coding agent through AI Gateway to run Opus 5 with unified spend tracking, model fallbacks, and access to every model.
Run vercel ai-gateway coding-agents setup
to detect the agents on your machine, provision a key, and write their config. See how to set it up in Claude Code.