GLM-5.1 (Reasoning) API Pricing
Z AI · released 2026-04-07 · merges 2 reasoning-effort tiers
Also searched as: GLM-5.1 pricing · GLM 5.1 price
Benchmarks shown for the highest-scoring reasoning tier. Merged tiers: GLM-5.1 (Reasoning), GLM-5.1 (Non-reasoning).
GLM-5.1 price
0.129¢ / 1K
0.407¢ / 1K
0.198¢ / 1K
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | 0.186¢ |
| RAG query | 4,000 in / 500 out | 0.718¢ |
| Long document summary | 50,000 in / 1,000 out | $0.0683 |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $0.0467 |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $55.91 |
Cost = (input tokens ÷ 1,000,000 × $1.285) + (output tokens ÷ 1,000,000 × $4.07).
Benchmarks
#82 of 547
#57 of 195
Similar intelligence, lower price
| Model | Intelligence | Blended $/1M |
|---|---|---|
| DeepSeek V4 Flash 0420 (High) | 24.4 | $0.142 |
| Solar Mini 4 | 24.1 | $0.175 |
| Hy3 | 25.3 | $0.241 |
| Solar Pro 4 | 28.2 | $0.525 |
| Inkling Small | 25.7 | $0.525 |
Leaderboard neighbours
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Apodex 1.1 | 26.4 | $0.975 |
| Claude Opus 4.6 (Non-reasoning, High) | 26.4 | $10.00 |
| Gemini 3 Flash Preview (Reasoning) | 26.3 | $1.125 |
| GLM-5.1 (Reasoning) | 26.1 | $1.981 |
| GPT-5.5 Instant (June 2026) | 26.0 | $11.25 |
| MiMo-V2.5-Pro (Reasoning) | 26.0 | $0.544 |
| Kimi K2.7 Code | 25.8 | $1.712 |
More from Z AI
| Model | Intelligence | Blended $/1M |
|---|---|---|
| GLM-5.3 (Max) | 44.8 | $2.15 |
| GLM-5.3-Flash | 41.8 | $0.237 |
| GLM-5.2 (Max) | 33.7 | $2.15 |
| GLM-5 (Reasoning) | 27.9 | $1.55 |
| GLM-5-Turbo | 26.6 | — |
| GLM 5V Turbo (Reasoning) | 23.5 | — |
| GLM-4.7 (Reasoning) | 22.2 | $1.00 |
| GLM-4.6 (Reasoning) | 18.5 | $0.963 |
Count tokens & estimate cost for GLM-5.1 (Reasoning) See GLM-5.1 (Reasoning) on the leaderboard
Source: Artificial Analysis · last synced 2026-10-15
FAQ
Who develops GLM-5.1 (Reasoning)?
GLM-5.1 (Reasoning) is developed by Z AI, released 2026-04-07.
How much does GLM-5.1 (Reasoning) cost per million tokens?
GLM-5.1 (Reasoning) costs $1.285 per 1M input tokens and $4.07 per 1M output tokens ($1.981 blended), per Artificial Analysis's official pricing data.
What is the GLM-5.1 API price?
The GLM-5.1 API price is $1.285 per 1M input tokens and $4.07 per 1M output tokens ($1.981 per 1M blended).
How much does GLM-5.1 cost for a typical request?
A short chat reply (500 in / 300 out tokens) costs about 0.186¢ on GLM-5.1, at $1.285/1M input and $4.07/1M output.
Is GLM-5.1 free?
GLM-5.1's official API list price is $1.285 per 1M input tokens and $4.07 per 1M output tokens. This site tracks list prices only, not free tiers or trial credits — check Z AI's site for those.
How does GLM-5.1 (Reasoning) rank on benchmarks?
GLM-5.1 (Reasoning) scores 26.1 on the Artificial Analysis Intelligence Index, ranking #82 of 547 models we track.
Is there a cheaper model with similar intelligence to GLM-5.1 (Reasoning)?
Yes — DeepSeek V4 Flash 0420 (High) scores similar intelligence (24.4) at $0.142/1M blended, versus $1.981/1M for GLM-5.1 (Reasoning).
Where does this data come from?
Pricing and benchmark data for GLM-5.1 (Reasoning) comes from Artificial Analysis (artificialanalysis.ai), synced daily. Last synced 2026-10-15.