ModelsThe Decoder· Jun 26, 2026
OpenAI Releases GPT-5.6 Sol to Compete with Claude Mythos Under Access Limits
OpenAI has introduced its GPT-5.6 Sol model as a competitor to Anthropic's Claude Mythos 5. The new model outperforms the rival on coding benchmarks but faces a restricted rollout. US government rules are limiting access, which OpenAI describes as unsustainable.
Key points
- →GPT-5.6 Sol outperforms Claude Mythos 5 on coding benchmarks
- →US government regulations restrict the model's rollout
- →OpenAI criticizes the access rules as unsustainable
- →Model launched specifically to rival Anthropic's offering
Mentioned
OpenAIGPT-5.6 SolAnthropicClaude Mythos 5
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