GLM-5.2 Fast runs Z.ai's GLM-5.2 on a throughput-optimized path that delivers two to three times standard generation speed at the same quality bar. The underlying model, released in June 2026 under an MIT license, is a 744B-parameter mixture-of-experts design that debuted as the top-ranked open-weight model on the Artificial Analysis Intelligence Index. Agentic coding and terminal work are where it shines, with strong showings on SWE-bench Pro and Terminal-Bench, and its context window stretches past one million tokens with output up to 131K. The Fast tier keeps those strengths while cutting time to completion, a good match for interactive coding agents, large-codebase analysis, and reasoning-heavy pipelines where latency matters.
GLM-5.2 Fast runs on 2 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.
One of GLM-5.2 Fast's 2 routes is on the monitoring board, so the figure below is that provider's availability rather than the model's.
Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.
Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. 1 further route is not on the board yet. See uptime for every provider Opper monitors.
Each route hosting GLM-5.2 Fast 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. GLOBAL; SCCs; DPA available.
Zero data retention is on by default on Pay-as-you-go — no action required. No training on customer data. US; unknown; DPA available.
Call GLM-5.2 Fast through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into a coding agent like Claude Code, Cursor or Codex 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: "fireworks/glm-5p2-fast",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
