GLM-5.1 (Reasoning) API Pricing
Z AI · released 2026-04-07 · merges 2 reasoning-effort tiers
Benchmarks shown for the highest-scoring reasoning tier. Merged tiers: GLM-5.1 (Reasoning), GLM-5.1 (Non-reasoning).
Pricing
0.120¢ / 1K
0.440¢ / 1K
0.200¢ / 1K
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | 0.192¢ |
| RAG query | 4,000 in / 500 out | 0.7¢ |
| Long document summary | 50,000 in / 1,000 out | $0.0644 |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $0.0448 |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $57.60 |
Cost = (input tokens ÷ 1,000,000 × $1.20) + (output tokens ÷ 1,000,000 × $4.40).
Benchmarks
#71 of 533
#57 of 197
Similar intelligence, lower price
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Ling 3.0 Flash | 24.9 | $0.111 |
| Ling-3.0-flash-VL | 24.6 | $0.111 |
| DeepSeek V4 Flash 0420 (Reasoning, High Effort) | 26.0 | $0.168 |
| MiMo-V2.5 | 25.2 | $0.175 |
| Hy3 | 25.3 | $0.25 |
Leaderboard neighbours
| Model | Intelligence | Blended $/1M |
|---|---|---|
| GLM-5-Turbo | 26.6 | — |
| Claude Opus 4.6 (Non-reasoning, High Effort) | 26.4 | $10.00 |
| Gemini 3 Flash Preview (Reasoning) | 26.3 | $1.125 |
| GLM-5.1 (Reasoning) | 26.1 | $2.00 |
| DeepSeek V4 Flash 0420 (Reasoning, High Effort) | 26.0 | $0.168 |
| GPT-5.5 Instant (June 2026) | 26.0 | $11.25 |
| MiMo-V2.5-Pro | 26.0 | $0.544 |
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 2026-09-22
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 $1.20 per 1M input tokens and $4.40 per 1M output tokens ($2.00 blended), per Artificial Analysis's official pricing data.
How does GLM-5.1 (Reasoning) rank on benchmarks?
GLM-5.1 (Reasoning) scores 26.1 on the Artificial Analysis Intelligence Index, ranking #71 of 533 models we track.
Is there a cheaper model with similar intelligence to GLM-5.1 (Reasoning)?
Yes — Ling 3.0 Flash scores similar intelligence (24.9) at $0.111/1M blended, versus $2.00/1M 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 2026-09-22.