GPT-6 Astra Shows Strong Tool Use and Math Results but Trails in Text Quality Tests
OpenAI released GPT-6 Astra on 3 September 2026 with capabilities for long-horizon tasks involving code, documents and external tools. Independent benchmarks from Artificial Analysis, Epoch AI and others reveal a mixed picture: the model leads in Epoch Capabilities Index and certain coding agent tests yet falls behind Claude Fable 5.1 in text generation and some professional document tasks. Astra solved two previously open problems on FrontierMath Erdős and reached 99.9 percent on ARC-AGI-3 when paired with a state-preserving adapter. The model was rated Critical for cyber capabilities after scoring 100 percent on ExploitBench and discovering two previously unknown vulnerabilities. Pricing starts at $10 per million input tokens, 2.5 times higher than GPT-5.6 Sol, while real-world costs vary sharply depending on task length and retries.
SecuritylabSep 8, 2026Translated from Russian