Last refreshed 2026-06-30. Next refresh: weekly.
Why use GLM-5.1 on Vercel AI Gateway?
Vercel AI Gateway offers GLM-5.1 with pay-as-you-go pricing at $1.40/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare GLM-5.1 across 5 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],zai/glm-5.1Request example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="zai/glm-5.1",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "zai/glm-5.1", not the LLMReference slug "glm-5.1".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
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 | $1.40 |
| Output tokens | $4.40 |
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).