Basis completes a tax workbook 2x faster with GPT-6 Astra
OpenAI — News · Sep 28, 2026
Claim: GPT-6 Astra completes a 50-tab tax workbook 2x faster than GPT-5.6 Sol, with better user intent understanding.
Evidence: One Basis workbook completion benchmark; claim of "stronger understanding" without ablation or comparative metrics.
Archive rationale
Baseline tier 3 downgraded to 2: bare anecdotal claim (one workbook, one benchmark) with no reproducible methodology, ablation, or comparative details. "2x faster" is quantified but unverified and lacks context (latency? wall-clock? token throughput?). "Stronger understanding of user intent" is unquantified superlative. Not applicable to Timothy's CC+Codex agentic TS/Supabase/Vercel stack; purely a spreadsheet tax vendor use case. Zero durability (contingent on model version leap). No composition specificity or commoditization signal. Verdict: discard as isolated vendor anecdote.