GPT-5.5 Pro (OpenAI) vs GLM-5.3 (reka-ai)
GLM-5.3 (reka-ai) is cheaper on output tokens, while GPT-5.5 Pro (OpenAI) offers a larger context window. Choose GPT-5.5 Pro (OpenAI) or GLM-5.3 (reka-ai) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.5 Pro (OpenAI) | GLM-5.3 (reka-ai) |
|---|---|---|
| Provider | LLM Gateway | LLM Gateway |
| Input / 1M tokens | $30.00 | $1.17 |
| Output / 1M tokens | $180.00 | $3.96 |
| Context window | 1.1M | 1M |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Apr 2026 | Aug 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.