Arena.ai Shares Reactions to GPT-6 Astra and Fable 5.1

Arena.ai posted about a video featuring initial reactions from @petergostev on GPT-6 Astra by OpenAI compared with Fable 5.1 and Fable 5 by AnthropicAI. The post highlights discussion of cost, coding capabilities, and benchmarks. It directs viewers to the linked video for details on what changed in the Fable update and how the models stack up. The company account positions the content as early reactions to Anthropic's Fable 5.1 release and its competitive standing. No further confirmation or independent verification appears in the packet beyond the account's own statement and link.