Kimi K3 (an open Chinese model) beat Opus 4.8 on automated retro-game generation…

Brief

Kimi K3, an open Chinese model, beat Opus 4.8 in automated creation of three retro arcade games (Road Fighter, Battle City, Qbert), delivering the strongest Qbert and integrated gameplay/AI. Tests used identical prompts; Kimi used 18.4K tokens ($0.28) versus Opus 4.8’s 21.3K tokens ($0.54). The author presents this as mid‑2026 parity with well‑funded US labs.

Why it matters

Kimi K3 (an open Chinese model) beat Opus 4.8 on automated retro-game generation for Road Fighter, Battle City, and Q*bert, producing the best Q*bert where the player jumps on cubes, paints them, and flees a purple snake; Kimi reportedly got gameplay, physics, mechanics, and AI behavior all working together.

Key details

Token usage and cost per run: Kimi K3 used 18.4K tokens for $0.28, GPT-5.6 used 18.1K tokens for $0.28, and Opus 4.8 used 21.3K tokens for $0.54 — Kimi K3 cost almost 2× less than Opus 4.8.

GPT-5.6 struggled on cars and produced a broken Battle City (tank died, base got hit); the author frames Kimi K3 as an open Chinese model competing head-to-head with US ‘frontier’ labs backed by billions as of mid‑2026.

WHO WOULD'VE THOUGHT THAT BY MID-2026, AN OPEN CHINESE MODEL WOULD BE COMPETING HEAD-TO-HEAD WITH US FRONTIER LABS BACKED BY BILLIONS IN FUNDING????

Kimi K3 just beat Opus 4.8 on retro game generation while costing almost 2x less

Kimi K3: 18.4K tokens - $0.28
GPT-5.6: 18.1K tokens - $0.28
Opus 4.8: 21.3K tokens - $0.54

They tested all three models on the same prompts:
• Road Fighter
• Battle City
• Q*bert

The crazy part is that it got the gameplay, physics, mechanics, and AI behavior ALL WORKING TOGETHER

And this is quickly becoming the new normal.

Video

atomic.chat (@atomicchathq)

New Kimi K3 beat Opus 4.8 at making retro games for 2x cheaper!

We gave three models the same task: make three old arcade games that play by themselves. Each game is one HTML file with a bot that plays it

Prompts:
– Road Fighter
– Battle City
– Q*bert

Outputs:
Kimi K3: 18.4K tokens, $0.28
GPT-5.6: 18.1K tokens, $0.28
Opus 4.8: 21.3K tokens, $0.54

Kimi K3 made the best games. Its Q*bert is the best of all three. The player jumps on the cubes, paints them and runs from the purple snake. Its Battle City looks just like the real game and plays right. The tanks move, aim, shoot and break the walls. GPT-5.6 could not handle the cars. Its Battle City broke too. The tank died on its own and the base got hit. But GPT had the nicest textures of the three

Video

— https://nitter.net/atomicchathq/status/2077854291058950261#m