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GPT-6 Sol vs Claude Haiku 5.5

GPT-6 SolOpenAI
Claude Haiku 5.5Anthropic
Our take

GPT-6 Sol wins 4 of 4 categories, but Claude Haiku 5.5 is 20.0× cheaper for everyday text work. Pick GPT-6 Sol when quality matters most, Claude Haiku 5.5 at volume.

Overall52Best44
Coding62Best52
Writing36Best24
Support37Best34
Value4250Best
Input / 1M$2.00$0.10Best
Output / 1M$10.00$0.50Best
Blended / 1M$4.00$0.20Best
Context window1.1MBest1M
Open weightsNoNo
Released22 Sept 20267 Oct 2026

Your monthly bill

50k
GPT-6 Sol$800
Claude Haiku 5.5$40.00Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.