Anthropic odds dip as OpenAI expands GPT-5.4 rollout and Mythos access is limited

April 15, 2026 · flowframe Pulse

Anthropic’s price pulled back after OpenAI accelerated the broad rollout of its top-tier GPT-5.4 models, which currently lead several industry reasoning benchmarks. Sentiment was further impacted by Anthropic’s decision to restrict its powerful new 'Mythos' frontier model to a private safety consortium, raising doubts about whether its most capable technology will be publicly available for leaderboard testing by June.

57¢ → 49¢ • Vol: $0.6M

Source: https://flowframe.xyz/pulse/anthropic-odds-dip-as-openai-expands-gpt-54-rollout-and-mythos-access-is-limited-effbd8

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