GLM-5.3-Flash vs DeepSeek V4.1-Flash
GLM-5.3-Flash is from Zhipu AI, released August 26, 2026. DeepSeek V4.1-Flash is from DeepSeek, released September 10, 2026.
- LMArena Elo1475 vs 1475. Both rated 1475 on LMArena.
- Input per 1M$0.15 vs $0.30. GLM-5.3-Flash costs 50% less per million input tokens.
- Output per 1M$0.50 vs $1.20. GLM-5.3-Flash costs 58% less per million output tokens.
- Context window1M vs 1M. Both hold 1M tokens of context.
Prices are the vendors’ published API rates; Elo is LMArena’s text board. Each figure is dated on its model page.
Interactive Comparison
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$0.15 / $0.50 per million tokens | $0.30 / $1.20 per million tokens | |
|---|---|---|
| Identity | ||
| Developer | Zhipu AI | DeepSeek |
| Released | Aug 2026 | Sep 2026 |
| Status | GA | GA |
| Licence | MIT (weights on Hugging Face, zai-org/GLM-5.3-Flash) | MIT |
| Self-hostable | Yes - MIT weights published at launch | Yes - open weights on Hugging Face |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $0.237 / 1M tokens | $0.525 / 1M tokens |
| Input price | $0.150 / 1M tokens | $0.300 / 1M tokens |
| Output price | $0.500 / 1M tokens | $1.200 / 1M tokens |
| Cached input | 0.03 | $0.006 / 1M tokens (peak); $0.003 off-peak |
| Batch discount | Not offered; GLM Coding Plan applies a 50% off-peak points reduction | Off-peak billing: 50% off all rates |
| Free tier | Not offered; included in the GLM Coding Plan at 3x the GLM-5.3 quota | — |
| Capacity | ||
| Context window | 1M tokens | 1M tokens |
| Max output | 128k tokens | 384k tokens |
| Long-context surcharge | Not published | None (flat rate across the 1M window) |
| Capability | ||
| Vision in | Yes - text, image, video and file input | Yes |
| Audio in | Not documented | No |
| Function calling | Yes | Yes |
| Structured output | Yes | Yes - JSON output |
| Extended reasoning | Yes - thinking mode | Yes - thinking (default) and non-thinking modes |
| Web search | Not documented | No |
| Code execution | Not documented | No |
| Access | ||
| API | Yes | Yes |
| Chat app | Yes | Yes |
| Cloud marketplaces | Not documented | Not offered |
| Fine-tuning | Not offered | Not offered (weights are open) |
| Measured quality | ||
| LMArena Elo | 1475 (checked Oct 2026) | 1475 (checked Oct 2026) |
| LMArena rank | Rank 38 | Rank 39 |
| GPQA Diamond | 90 · max effort | — |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 6211 | 2810 |
