DeepSeek V4 Pro vs Claude Opus 4.7 vs GPT-5.5: The Frontier in April ...
Anthropic shipped Claude Opus 4.7 on April 16. OpenAI followed with GPT-5.5 on April 23 at $5 input / $30 output per million tokens — double the GPT-5.4 rate. A day later, DeepSeek released V4 Pro under MIT license at $1.74 / $3.48 per million, roughly 9x cheaper than GPT-5.5 on output. Opus 4.7…
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