GLM 5 vs DeepSeek V4 Pro 0813: A Near-Tie for Arena Crown

GLM 5 and DeepSeek V4 Pro 0813 are separated by less than a point on LMArena Text — 1,446.15 to 1,445.51 as of October 8, 2026. That's basically a dead heat. The real question isn't which is smarter; it's which fits the job. Here's how they break down.

Arena score: a rounding error apart

GLM 5 edges DeepSeek V4 Pro 0813 by just 0.64 points. That's well within the noise of human preference ratings. LMArena measures how often people pick one response over the other across mixed tasks — it's not a universal capability score. If you flip a coin, you'll likely not notice the difference in everyday chat or writing.

What the score doesn't cover

Arena ratings say almost nothing about coding, agentic workflows, or instruction-following edge cases. The provided benchmark notes that Claude Opus 4.7 leads agentic tasks on AutoBench, and DeepSeek V4 Flash hits 82% on IFBench — but those are different models. For GLM 5 vs DeepSeek V4 Pro 0813 specifically, we don't have published breakdowns in the current material. So don't buy either one based on a single popularity contest.

Pricing: still unknown

Neither model appears in today's price table, so cost comparisons are off the table until vendors publish numbers. That's a real gap. If budget is your main constraint, wait for official per-million-token pricing before committing.

Verdict: which one should you pick?

Pick GLM 5 if you want the top of the current arena leaderboard — it's the bragging-rights choice by a hair. Pick DeepSeek V4 Pro 0813 if you trust the slightly lower score but prefer DeepSeek's track record and ecosystem. Honestly, for most users, this matchup won't decide a project. Test both on your actual prompts, then let your own preferences settle the tie.