GLM-5.1

Z.ai (Zhipu AI)balancedOpen Source

Z.ai's (Zhipu) 2026 flagship. 200K context, strong agentic and tool-use scores: 98% on τ²-Bench Telecom, on par with Grok 4.3. Artificial Analysis Intelligence Index 51.

Context Window

200K

tokens

Max Output

16K

tokens

Input Price

$0.98

per 1M tokens

Output Price

$3.08

per 1M tokens

Speed

48

tokens/sec

Released

Apr 2026

2026-04-28

Blended Cost

$2.03

per 1M tokens

Value Score

43.3

quality per $

Capabilities

ChatVisionFunction CallingCode GenerationReasoning

Benchmarks

Quality Index
88
MMLU Pro
85.8
HumanEval (Coding)
88.6
MATH
83.4
Arena ELO
1467

Price vs Quality

6080100$1.00$10.00$100.00Blended cost per 1M tokens (log scale) →GPT-4o — $6.25/1M, quality 85GPT-4o Mini — $0.375/1M, quality 72o3 Mini — $2.75/1M, quality 88o3 — $5.00/1M, quality 94GPT-4.1 — $5.00/1M, quality 89Claude Opus 4 — $45.00/1M, quality 91Claude Sonnet 4 — $9.00/1M, quality 88Claude 3.5 Haiku — $2.40/1M, quality 75Gemini 2.5 Pro — $5.63/1M, quality 92Gemini 2.0 Flash — $0.250/1M, quality 74Llama 4 Maverick — $0.400/1M, quality 80Llama 4 Scout — $0.275/1M, quality 71Mistral Large 2 — $4.00/1M, quality 79Codestral — $0.600/1M, quality 76DeepSeek V3 — $0.685/1M, quality 86DeepSeek R1 — $1.37/1M, quality 91Grok 3 — $9.00/1M, quality 87Grok 3 Mini — $0.400/1M, quality 78Command R+ — $6.25/1M, quality 68Amazon Nova Pro — $2.00/1M, quality 70Qwen 2.5 72B — $0.600/1M, quality 80Qwen 2.5 Coder 32B — $0.300/1M, quality 74Sonar Pro — $9.00/1M, quality 78GPT-5.5 — $17.50/1M, quality 97GPT-5.5 Pro — $105.00/1M, quality 96Claude Opus 4.7 — $15.00/1M, quality 96Gemini 3.1 Pro — $7.00/1M, quality 96DeepSeek V4 Pro — $1.32/1M, quality 89DeepSeek V4 Flash — $0.210/1M, quality 84Qwen 3.6 Plus — $3.50/1M, quality 86Grok 4.3 — $1.88/1M, quality 93Kimi K2.6 — $2.11/1M, quality 92Kimi K3 — $9.00/1M, quality 97Claude Sonnet 4.6 — $9.00/1M, quality 90Claude Opus 4.8 — $15.00/1M, quality 98Qwen 3.7 Max — $5.00/1M, quality 94Claude Fable 5 — $30.00/1M, quality 100MiniMax M3 — $1.50/1M, quality 89GPT-5.6 Sol — $17.50/1M, quality 98GPT-5.6 Terra — $7.00/1M, quality 93GPT-5.6 Luna — $0.700/1M, quality 83Gemini 3.6 Flash — $2.25/1M, quality 90Gemini 3.5 Flash-Lite — $1.40/1M, quality 79Claude Sonnet 5 — $9.00/1M, quality 93GLM-5.2 — $2.90/1M, quality 91Claude Opus 5 — $15.00/1M, quality 99Claude Mythos 5 — $30.00/1M, quality 100Grok 4.5 — $4.00/1M, quality 94Qwen3.8 Max — $4.00/1M, quality 96GLM-5.1 — $2.03/1M, quality 88GLM-5.1
Cheaper is left, more capable is up. 4 of 49 priced models are both cheaper and score at least as high. Self-host models are left off the price axis — their cost depends on the hardware you run them on, not on tokens.

Context Window in Context

  • Codestral256K
  • GLM-5.1200K
  • o3 Mini200K
  • o3200K
  • Claude Opus 4200K
  • Claude Sonnet 4200K
  • Claude 3.5 Haiku200K
  • Sonar Pro200K
Bar length is logarithmic — each full step is 10× the tokens. Shown against the models with the nearest context windows, not the directory extremes.

Pricing History

Apr 28, 2026$1.55 / $4.65(launch)
May 25, 2026$0.98 / $3.08current

Open Source: Licensed under MIT

Non è ancora sul nostro gateway

GLM-5.1 è a pesi aperti, quindi puoi eseguirlo tu stesso. Swfte Connect trasforma il tuo deployment in un endpoint gestito che parla la stessa API di ogni altro modello di questa directory.

La richiesta
curl https://api.swfte.com/agents/v2/gateway/chat/completions \
  -H "Authorization: Bearer $SWFTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zhipu:glm-5.1",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
Distribuisci questo modello con Swfte Connect

About GLM-5.1

GLM-5.1 is a balanced AI model by Z.ai (Zhipu AI), released on April 28, 2026. It supports a context window of 200K tokens and can generate up to 16K output tokens.

At $0.98 per million input tokens and $3.08 per million output tokens, its blended cost of $2.03/1M tokens puts it in the mid-range pricing tier. Its value score of 43.3 reflects the balance of quality and cost.

GLM-5.1 is available as an open-source model under the MIT license, meaning you can self-host it for predictable costs or use it through API providers like Swfte Connect.

Using GLM-5.1 with Swfte

Access GLM-5.1 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try GLM-5.1 in our AI Playground before integrating.

Deploy a model with Swfte Connect

One gateway, every provider, per-token cost visibility. Swap models without touching your code.