GPT-6.1 Sol vs GLM-5.3
GPT-6.1 Sol is from OpenAI, released September 29, 2026. GLM-5.3 is from Zhipu AI, released August 18, 2026.
- LMArena Elo1481 vs 1481. Both rated 1481 on LMArena.
- Input per 1M$2 vs $1.40. GLM-5.3 costs 30% less per million input tokens.
- Output per 1M$10 vs $4.40. GLM-5.3 costs 56% less per million output tokens.
- Context window1.05M vs 1M. GPT-6.1 Sol takes 5.0% more context in one request.
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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$2 / $10 per million tokens | $1.40 / $4.40 per million tokens | |
|---|---|---|
| Identity | ||
| Developer | OpenAI | Zhipu AI |
| Released | Sep 2026 | Aug 2026 |
| Status | GA | GA |
| Licence | Proprietary | GLM-5.3 License (custom: MIT-style terms plus a security-review clause for MaaS providers above $10B revenue); weights on Hugging Face, zai-org/GLM-5.3 |
| Self-hostable | No | Yes - weights published on Hugging Face |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $4.000 / 1M tokens | $2.150 / 1M tokens |
| Input price | $2.000 / 1M tokens | $1.400 / 1M tokens |
| Output price | $10.000 / 1M tokens | $4.400 / 1M tokens |
| Cached input | $0.10 per 1M tokens | $0.26 / 1M tokens |
| Batch discount | 50% (Batch and Flex) | Not offered; GLM Coding Plan applies a 50% off-peak points reduction |
| Free tier | — | Not offered |
| Capacity | ||
| Context window | 1,050,000 tokens | 1M tokens |
| Max output | 128,000 tokens | 128k tokens |
| Long-context surcharge | Over 272K input tokens: 2x input/cache rates and 1.5x output for the full request | Not published |
| Capability | ||
| Vision in | Yes | No — text-only input |
| Audio in | No | No |
| Function calling | Yes | Yes |
| Structured output | Yes | Yes |
| Extended reasoning | Yes | Yes — always on, three effort levels (low, high, max) |
| Web search | Yes | Not documented |
| Code execution | Yes | Not documented |
| Access | ||
| API | Yes | Yes |
| Chat app | ChatGPT Work and Codex; not Chat at launch | Yes |
| Cloud marketplaces | — | Not offered |
| Fine-tuning | No | Not offered |
| Measured quality | ||
| LMArena Elo | 1481 (checked Oct 2026) | 1481 (checked Oct 2026) |
| LMArena rank | Rank 27 | Rank 28 |
| GPQA Diamond | 95 · max effort | 91 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 370 | 689 |
