OpenAI Releases GPT-5.5 and Codex on Bedrock, Makes MiMo Code Open-Source Amid Claude Fable Controversy
claude gpt-5 openai open-source training
| Source: Dev.to | Original article
AI models GPT-5.5 and Codex GA launch on Bedrock. MiMo code goes open-source.
GPT-5.5 and Codex GA are now available on Bedrock, marking a significant milestone in the AI landscape. This development comes as Xiaomi drops MiMo code open-source, increasing accessibility for developers. Meanwhile, Anthropic's apology for invisible Claude Fable guardrails has sparked debate, with some critics dismissing it as unverifiable.
The integration of GPT-5.5 on Bedrock matters because it offers a more affordable alternative to Claude Fable 5, with pricing at $5/$30 per million tokens compared to Fable 5's $10/$50. Additionally, GPT-5.5's performance on the Brutal New Agents' Last Exam Benchmark has surpassed Claude Fable 5, particularly through OpenAI's Codex agent framework. As we reported on June 12, Anthropic's Claude Fable 5 has been making waves with its impressive benchmarks, but GPT-5.5's cost-effectiveness and coding capabilities make it a strong contender.
As the AI landscape continues to evolve, it's essential to watch how these developments impact the industry. Will the open-sourcing of MiMo code lead to increased innovation, and how will Anthropic respond to criticism over its guardrail apology? The battle for dominance between GPT-5.5 and Claude Fable 5 will be closely watched, with developers and businesses eagerly awaiting the next move. With GPT-5.5's availability on Bedrock, the stage is set for a thrilling competition that will shape the future of AI.
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