Opus 5.5 Fast beats Sol 6.1 Ultrafast on price: 33% cheaper at the same ~300 tok/s speed
kimmonismus · x · 2026-10-10
kimmonismus compared pricing between Anthropic's Opus 5.5 Fast and OpenAI's Sol 6.1 Ultrafast: at nearly identical throughput (280–300 tokens/s), Anthropic charges roughly 33% less across input, output, and caching — about 50% more tokens per dollar.
Specific numbers cited: Opus 5.5 Fast at $40 output / $8 input / $0.40 cache vs. Sol 6.1 Ultrafast at $60 / $12 / $0.60.
Note: the model names in the post are unconfirmed by official sources.
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