OpenAI · Language model

GPT-6.1 Sol

An upgrade to GPT-6 Sol shipped one week after it, at DevDay. OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at a fifth of Astra's token prices.

MakerOpenAI
ReleasedSeptember 29, 2026
API price (per 1M tokens)$2 in / $10 out
Open weightsNo

Best for

  • Coding in Codex
  • Professional work in ChatGPT
  • Astra-class jobs on a budget

Strengths

  • Replaces GPT-6 Sol as the default coding model in ChatGPT and Codex
  • Cached input cut to $0.10 per million tokens
  • Ultrafast option in Codex

Watch out for

  • High hallucination rate in Artificial Analysis's testing
  • Not available in regular ChatGPT chat

Ranking history

EditionPower RankingsCodingBest ValueOpen-Weight WatchImage GenerationVideo Generation
Week 45, 2026#4 (93)#3 (93)#3 (92)———
Week 44, 2026#4 (93)#3 (93)#4 (92)———
Week 43, 2026#4 (93)#3 (93)#4 (92)———
Week 42, 2026#4 (93)#3 (93)#3 (93)———
Week 41, 2026#4 (93)#3 (93)#2 (94)———

Head-to-head