Last refreshed 2026-06-30. Next refresh: weekly.
Why use GLM-5.1 on OpenRouter?
OpenRouter offers GLM-5.1 with pay-as-you-go pricing at $1.05/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare GLM-5.1 across 5 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: z-ai/glm-5.1z-ai/glm-5.1Request example
z-ai/glm-5.1.Gotchas
- Use provider model ID "z-ai/glm-5.1", not the LLMReference slug "glm-5.1".
Compare GLM-5.1 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Z.ai | $1.40 | $4.40 |
| OpenRouter | $1.05 | $3.50 |
| Fireworks AI | $1.40 | $4.40 |
| Vercel AI Gateway | $1.40 | $4.40 |
| Novita AI | $1.38 | $4.40 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.05 |
| Output tokens | $3.50 |
Capabilities
About GLM-5.1
Post-training variant of GLM-5 from Z.ai (Zhipu AI) with enhanced agentic coding capabilities. Released April 7, 2026. 754B parameters (40B active) in Mixture of Experts architecture, 200K token context, 128K max output. Supports autonomous plan–execute–test–fix–optimize loops for up to 8 hours without human intervention. Trained entirely on Huawei Ascend hardware (no Nvidia). Key benchmarks: SWE-bench Pro 58.4 (world #1 at release, surpassing GPT-5.4 57.7 and Claude Opus 4.6 57.3), GPQA Diamond 86.2, AIME 2026 95.3, Terminal-Bench 2.0 63.5, MCP-Atlas 71.8, Chatbot Arena Elo 1475 (June 16, 2026, arena.ai).