Grok 4.7 Meets Xiaomi MiMo-V2.6 in a Same-Night Price War
In the early hours of September 22, xAI's delayed Grok 4.7 and Xiaomi's MiMo-V2.6 launched one after the other. Third-party evaluations showed similar capabilities, but MiMo-V2.6's output price is roughly 1/16 to 1/20 of Grok 4.7's, and multiple reviewers considered Grok 4.7 below expectations.
Confirmed
- Five days after livestreaming its RL training on the 19th, Xiaomi released three MiMo-V2.6 variants—Pro, Flash, and Pro-UltraSpeed—with UltraSpeed output up to 20x faster than Pro; Pro costs 0.025 yuan per million cached-hit input tokens. MiMo-V2.6 topped the open-source leaderboard (@卡尔的AI沃茨).
- Grok 4.7 is a newly pretrained 2.1T-parameter model with a 500K context; Cognition brought it to Devin, scoring 59.4% on FrontierCode 1.1 Extended, which the company says performs well on hard backend engineering tasks (@airesearch12).
- Pricing: Grok 4.7 output costs up to ¥40/M tokens versus about ¥2 for MiMo-V2.6—roughly 16x cheaper, by some counts 20x (@op7418, @歸藏的AI工具箱, @卡尔的AI沃茨).
Reactions
- @op7418 observes that model releases now split into two extremes—cheapest or most frontier—or they get no traction.
- @数字生命卡兹克 tested Grok 4.7 and found it below expectations with an AA index of 46; @airesearch12 relays users calling Grok 4.7 disappointing given MiMo's similar intelligence at far lower cost.
Why it matters
Two models released the same day with near-equal capability but an order-of-magnitude price gap highlight open-source budget models directly challenging closed-source frontier models—"a new open-source leader at half the price" is the core narrative of this round.
2026-09-22 ~ 2026-09-23 · 5 related posts
- Episode 1: Grok 4.7 Briefly Surfaces in OpenCode Zen Directory, Fueling Launch Rumors(2026-09-21, 5 posts)
- Episode 2: xAI launches Grok 4.7 with major benchmark gains at unchanged price and speed(2026-09-21, 59 posts)
- Episode 3: Grok 4.7 Day-One Hands-On: Strong Word-of-Mouth for Autonomous Coding(2026-09-22, 17 posts)
- Episode 4: Grok 4.7 Launches: Big Benchmark Gains but Doubled Token Use Sparks Cost Debate(2026-09-22, 25 posts)
- Episode 5: Grok 4.7 Reportedly Closes Gap With Top Frontier Models at Lower Cost(2026-09-22, 2 posts)
- Episode 6: Open-Source Grok 4.7 Editor Extension Passes 140K Installs(2026-09-22, 3 posts)
- Episode 7: Bug Hunt Bench: GPT-6 Astra Tops 105-Bug Fixing Test, MiMo Stuns on Value(2026-09-22, 18 posts)
- Episode 8: Grok 4.7 Meets Xiaomi MiMo-V2.6 in a Same-Night Price War(2026-09-22, 5 posts)
- Episode 9: xAI Ships Three Grok Frontier Models in Nine Weeks(2026-09-22, 2 posts)
Primary sources
- [source] Grok 4.7 lands in Devin at 59.4% on FrontierCode, but Xiaomi MiMo-V2.6 undercuts it — airesearch12 · 2026-09-22
- [source] Grok 4.7 and Xiaomi MiMo-V2.6 Drop Same Night: New Open-Source Leader at Half the Price — 数字生命卡兹克 · 2026-09-22
- Grok 4.7 vs MiMo V2.6: Same Benchmarks, 16x Price Gap in New Model Releases — 歸藏的AI工具箱 · 2026-09-22
- Mimo V2.6 undercuts Grok 4.7 by 6x on output price amid same-day model launches — op7418 · 2026-09-22
- [source] Xiaomi MiMo-V2.6 tops open-source AI leaderboard at 1/20th the price of Grok 4.7 — 卡尔的AI沃茨 · 2026-09-23