OpenAI claims GPT-5.6 Sol beats Opus 5 on ARC-AGI-3 with its latest API and two additional settings

OpenAI claims its GPT-5.6 Sol model scored 38.3 percent on the ARC-AGI-3 benchmark, beating Anthropic's Opus 5, but only when using OpenAI's own API features and two additional settings; under the official test setup, GPT-5.6 Sol scored 7.8 percent. ARC Prize says its test environment is provider-neutral but may have used an outdated API that skewed the comparison with Opus 5.

OpenAI counters Anthropic's ARC-AGI-3 record: GPT-5.6 Sol scores 38.3 percent, but only with its own API features instead of the official test setup, where the model landed at 7.8 percent. ARC Prize claims its test environment is provider-neutral, but may have used an outdated API that skewed the comparison with Opus 5. The article OpenAI claims GPT-5.6 Sol beats Opus 5 on ARC-AGI-3 with its latest API and two additional settings https://the-decoder.com/openai-claims-gpt-5-6-sol-beats-opus-5-on-arc-agi-3-with-its-latest-api-and-two-additional-settings/ appeared first on The Decoder https://the-decoder.com .