Best the OpenAI API Alternatives for Coding in October 2026

1. Claude Fable 5.1 Anthropic

   about as strong as GPT-6 Astra, same price.

   Score 74.7, $20 per M tokens blended.Compare with GPT-6 Astra

2. Gemini 4 Argon Google

   11.7 points behind GPT-6 Astra.

   Score 62.0, no API price.Compare with GPT-6 Astra

3. Kimi K3 Moonshot AI

   12.7 points behind GPT-6 Astra, 3.3× cheaper per token; open weights.

   Score 61.0, $6 per M tokens blended.Compare with GPT-6 Astra

4. GLM-5.3 Z.ai (Zhipu)

   14.2 points behind GPT-6 Astra, 9.3× cheaper per token; open weights.

   Score 59.5, $2.15 per M tokens blended.Compare with GPT-6 Astra

5. Grok 4.6 xAI

   15.2 points behind GPT-6 Astra, 6.7× cheaper per token.

   Score 58.5, $3 per M tokens blended.Compare with GPT-6 Astra

6. Muse Spark 1.3 Meta

   17.1 points behind GPT-6 Astra, 10.0× cheaper per token.

   Score 56.6, $2 per M tokens blended.Compare with GPT-6 Astra

7. MiMo-V2.6-Pro Xiaomi

   18.2 points behind GPT-6 Astra, 36.8× cheaper per token; open weights.

   Score 55.5, $0.54 per M tokens blended.Compare with GPT-6 Astra

8. Qwen3.8 Max Alibaba (Qwen)

   20.2 points behind GPT-6 Astra, 6.7× cheaper per token.

   Score 53.5, $3 per M tokens blended.Compare with GPT-6 Astra

More: All alternatives, Open-source, Cheaper