Three frontier releases hit the Vals Index Pareto frontier; Meta Ember at 0.84% the cost for 85% performance

AnkaReuel · x · 2026-11-11

Rayan Krishnan of Vals AI reviews this week's three major frontier releases—Fable 5.2, Gemini 4 Carbon, and Meta Ember—all on the Pareto frontier of the Vals Index. Fable 5.2 is the best frontier model; Gemini 4 Carbon ranks #3 while being both the fastest and cheapest of the top 5; Meta Ember is absurdly cheap, delivering 85% of Fable 5.2's performance at 0.84% of the cost. His takes: models are shipping faster than ever, competing at a frontier inaccessible to everyday people, so vibe checks mean nothing and priors need updating; the assumptions that Gemini underdelivers and Meta misaligns products with users are both wrong—Carbon is genuinely good and will deliver real value across Google surfaces; and Muse exhibits behavior more fundamentally aligned than outwardly safety-focused models.

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