cost per task
Vanaxity insights tagged cost per task - notes on AI content, SEO, GEO and AEO from Van Data Team.
Claude Sonnet 5.5 vs Opus 5.5: Which Fits Marketing Work?
Anthropic released Claude Opus 5.5 on September 22, 2026 and Claude Sonnet 5.5 on September 28. Sonnet 5.5 costs half as much per token and runs faster. On independent Artificial Analysis tests at top settings, the two are nearly tied on documents, spreadsheets and automation, but Opus 5.5 is far more reliable on facts and costs less per task. At matched lower settings, Opus 5.5 wins every test for a little more money, while Sonnet 5.5 starts answering much sooner. For marketing teams, the right choice depends on the task: accuracy-critical content favors Opus, and fast, high-volume drafting favors Sonnet.
GPT-6 Astra vs GPT-5.6 Sol: Is the Upgrade Worth 2.5x?
GPT-6 Astra is OpenAI's new frontier model and GPT-5.6 Sol is the model it replaces, but on the independent Artificial Analysis Intelligence Index the two tie at 61 while Astra costs 2.5x more, so the upgrade only pays off for specialized work like agentic computer use, long-context retrieval, and hard math or coding, not everyday marketing content where Sol is the better value.