Mistral Large 4 Failures Reexamined: Most Cases Just Forgot to Enable Reasoning

Users found that many viral Mistral Large 4 failures stemmed from not enabling reasoningeffort="high". Retests showed the model still struggled with an FPS game using 151k reasoning tokens, while an independent replication of the lava lamp test found Opus models also fail it, questioning the original test's fairness.

2026-10-07 ~ 2026-10-07 · 4 related posts

• Many Mistral Large 4 failures traced to reasoning mode not being enabled — qtnx_ · 2026-10-07
• Mistral Large 4 failure posts likely missed reasoning_effort=high, dev warns — qtnx_ · 2026-10-07
• Indie dev debunks viral Mistral Large 4 lava-lamp test: Opus models fail too — qtnx_ · 2026-10-07
• Testing Mistral Large 4 on FPS: 151K Reasoning Tokens Later, Still Rough — qtnx_ · 2026-10-07