Analyst maps OpenAI vs Anthropic coding race: Opus 5.5 sparks Anthropic revenue rebound
firstadopter · x · 2026-11-01
Analyst firstadopter lays out a timeline of the OpenAI vs Anthropic agentic coding battle:
- OpenAI pivoted resources to agentic coding after seeing Anthropic's late-2025 success;
- By April, OpenAI had largely caught up, with strong developer reception for its GPT-5.5 coding agent;
- The July 9 GPT-5.6 release arguably surpassed Anthropic in capability, letting OpenAI take material share and slowing Anthropic's growth;
- Anthropic's Sept. 22 Opus 5.5 release is expected to spark a business rebound, with ARR re-accelerating into IPO if the upcoming Fable 5.5 keeps the momentum.
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