Artificial Analysis
3 articles tagged with Artificial Analysis
Claude Opus 5 Scores 61 on Intelligence Index, Beats Fable 5 on Cost Across Most Benchmarks
Anthropic's Claude Opus 5 posts a 61 on the Artificial Analysis Intelligence Index, narrowly beating Claude Fable 5 (60) and GPT-5.6 Sol (59) while costing less per task. The model leads in coding and knowledge-work benchmarks but shows a rising hallucination rate of 50 percent.
Anthropic Ships Claude Opus 5, Claims Near-Fable Performance at Half the Price
Anthropic released Claude Opus 5 on July 24, 2026, positioning it as a lower-cost alternative to its more expensive Claude Fable 5 model. Independent evaluators Epoch AI and Artificial Analysis report mixed but largely favorable results, with Opus 5 nearly matching Fable 5 on coding benchmarks while cutting cost-per-task by roughly 20%.
Grok 4.20 trails GPT-5.4 and Gemini 3.1 but achieves record 78% non-hallucination rate
xAI's Grok 4.20 scores 48 on Artificial Analysis' Intelligence Index—6 points ahead of Grok 4 but trailing Gemini 3.1 Pro Preview and GPT-5.4 at 57. The model distinguishes itself with a 78% non-hallucination rate on the AA Omniscience test, the highest recorded across any model tested.