Google DeepMind and Artificial Analysis Launch MKA, a Multimodal Knowledge Agent Benchmark of 200 Real Visual Tasks: Claude Fable 5.2 Leads at 57%, Gemini 4 Carbon Scores 54% at About One-Fifth the Cost per Task
On November 10, Google DeepMind and Artificial Analysis launched MKA (Multimodal Knowledge Agent), a benchmark that tests whether agents can read visually dense files such as architectural drawings, engineering schematics, and clinical scans and deliver slide decks, spreadsheets, reports, and marked-up images. Its 200 private tasks span 10 industries and 83 occupations, with about 70 expert rubric checks per task. Artificial Analysis tested 21 models at launch: Claude Fable 5.2 (max) leads with a Climb WSR of 57%, followed by Gemini 4 Carbon (high) at 54% and Claude Opus 5.5 (max) at 53%. Fable averages $31.97 per task versus $6.29 for Carbon. Ten public tasks are on Hugging Face.

Key Takeaways
- Scale: 200 private tasks across 10 industries and 83 occupations, each equal to 3–8 hours of work for a seasoned professional, graded on about 70 yes/no checks weighted 75% factual accuracy and 25% visual design (Google blog)
- Leaderboard (Climb WSR): Claude Fable 5.2 (max) 57%, Gemini 4 Carbon (high) 54%, Claude Opus 5.5 (max) 53%, out of 21 models tested (AA leaderboard)
- Cost: Fable 5.2 averages $31.97 per task, more than 5x Carbon ($6.29) and about 29x GPT-6.1 Sol ($1.11); the cheapest is GPT-6 Luna (Max) at $0.18
- No single winner: Fable 5.2 leads 5 verticals, Opus 5.5 leads Education and Construction, Gemini 4 Argon leads Science, and Carbon leads Healthcare; Word document and text file outputs are hardest, with no model above 52%
- Method: every model runs in the open-source Stirrup agent harness (up to 250 turns) and is graded by a non-Google model, GPT-6 Luna, as an agentic judge that agreed with domain experts 96% of the time; 10 public tasks are on Hugging Face under Apache-2.0











