Claude Opus 4.8 by Anthropic, highly capable model for complex reasoning, coding, and agentic work with 1M context and improved efficiency. Claude Opus 4.8 builds on Opus 4.7 with improved performance across benchmarks. It posts stronger results on Terminal-Bench 2.1 and CursorBench with more efficient tool calling, requiring fewer steps to complete tasks. Opus 4.8 shows sharper, more reliable judgment on agentic tasks, excelling at computer use and browser-agent work with an 84% score on Online-Mind2Web. It takes the highest Legal Agent Benchmark score recorded, becoming the first model to break 10% on the all-pass standard for substantive legal work. A key improvement is honesty: the model is roughly four times less likely than Opus 4.7 to let flaws in its own code pass unremarked, while proactively flagging uncertainty and avoiding unsupported claims. With a 1M token context window, better context management across extended sessions, and improved token efficiency, Opus 4.8 supports dynamic workflows that coordinate many parallel subagents for large-scale tasks.
Claude Opus 4.8 runs on 4 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance β full data-handling detail per route below.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| Anthropic | US | Enterprise | No | $5.00 | $25.00 |
| AWS Bedrock | EU | Zero data retention | No | $5.00 | $25.00 |
| Azure | EU | Enterprise | No | $5.00 | $25.00 |
| Google Cloud | US | Enterprise | No | $5.00 | $25.00 |
Training posture across routes: No training on prompts by default.
Each route hosting Claude Opus 4.8 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Zero data retention is on by default on Pay-as-you-go β no action required. No training on customer data. EU; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. EU; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Independent benchmark scores β composite indices for reasoning, coding, and math, plus individual eval scores where available.
Call Claude Opus 4.8 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent β Claude Code, Cursor, Codex, and more β and it'll wire up Opper for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.OPPER_API_KEY,baseURL: "https://api.opper.ai/v3/compat",});const completion = await client.chat.completions.create({model: "anthropic/claude-opus-4-8",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
