GLM 5.1 is Z.ai's foundation model with a 202K-token context window for processing extended documents and conversations.
- Strengths
- The model balances capability and efficiency across general reasoning and language tasks.
- Best for
- Applications requiring moderate context length and broad language understanding without multimodal or specialized reasoning demands.
- Limitations
- Superseded by GLM 5.2 and later releases, which offer expanded context windows (1M tokens) and additional capabilities; not optimized for multimodal input, batch processing, or specialized reasoning workloads.
Input / 1M
$0.966
Output / 1M
$3.04
Cached input / 1M
$0.1794
Context window
200K
Price history
Input (solid)Output (dashed)
Price change
- 30d
- in increased 1.5% out increased 1.5%
- 90d
- in decreased 1.4% out decreased 1.4%
- 1y
- in decreased 1.4% out decreased 1.4%
- Since launch
- in decreased 1.4% out decreased 1.4%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 30 Aug 2026 | $0.966 | $3.04 | $0.1794 | Imported from OpenRouter | openrouter.ai |
| 25 Aug 2026 | $1.26 | $3.96 | $0.234 | Imported from OpenRouter | openrouter.ai |
| 15 Aug 2026 | $0.966 | $3.04 | $0.1794 | Imported from OpenRouter | openrouter.ai |
| 14 Aug 2026 | $1.40 | $4.40 | $0.26 | Imported from OpenRouter | openrouter.ai |
| 13 Aug 2026 | $0.952 | $2.99 | $0.1768 | Imported from OpenRouter | openrouter.ai |
| 12 Aug 2026 | $1.40 | $4.40 | $0.26 | Imported from OpenRouter | openrouter.ai |
| 11 Aug 2026 | $0.952 | $2.99 | $0.1768 | Imported from OpenRouter | openrouter.ai |
| 10 Aug 2026 | $0.952 | $2.99 | $0.1768 | Imported from OpenRouter | openrouter.ai |
| 5 Aug 2026 | $0.952 | $2.99 | $0.1768 | Imported from OpenRouter | openrouter.ai |
| 3 Jul 2026 | $0.966 | $3.04 | $0.1794 | Imported from OpenRouter | openrouter.ai |
| 30 Jun 2026 | $0.975 | $4.30 | — | Imported from OpenRouter | openrouter.ai |
| 25 Jun 2026 | $0.98 | $3.08 | $0.182 | Imported from OpenRouter | openrouter.ai |
| 21 Jun 2026 | $0.98 | $3.08 | $0.49 | Imported from OpenRouter | openrouter.ai |
| 11 Jun 2026 | $0.98 | $3.08 | $0.182 | Imported from OpenRouter | openrouter.ai |