Gemini 4 Argon vs GLM-5.3 (Workers AI)
GLM-5.3 (Workers AI) reads a 26.2K-token pull request for $0.0367, 30% less than Gemini 4 Argon ($0.0524). Both sit in the mid-range price tier, so the choice between them is about review quality more than budget. The benchmark cannot separate their recall: Gemini 4 Argon minus GLM-5.3 (Workers AI) is +21 pts (95% interval +9 pts to +34 pts).
Side by side
| Figure | Gemini 4 Argon | GLM-5.3 (Workers AI) |
|---|---|---|
| Price tier | Mid-range | Mid-range |
| Bugs caughtshare of known bugs | 82% (better) | 61% |
| False alarmsper clean PR | 1.1 (better) | 1.9 |
| Cost per reviewmeasured | $0.0527 | $0.0311 (better) |
| Cost per bug caught | $0.0706 | $0.0559 (better) |
| Exact linecatches on the expected lines | 78% | 85% (better) |
| Review timemean | 99s | 65s (better) |
| Typical review calllist price | $0.0766 | $0.0473 (better) |
| Input / 1M tokens | $2.00 | $1.40 (better) |
| Output / 1M tokens | $10.00 | $4.40 (better) |
| Context window | 1M | 1M |
Head to head
The known bugs both were scored on, by who caught each in at least one run.
By language
| Model | All | TypeScript6 bugs | Go4 bugs | Java4 bugs | Rust4 bugs | C#3 bugs | JavaScript3 bugs | Kotlin3 bugs | PHP3 bugs | Python3 bugs | Ruby3 bugs | Swift3 bugs | C++2 bugs | C1 bug |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 4 Argon | 82% | 83% | 50% | 83% | 75% | 89% | 67% | 100% | 100% | 83% | 100% | 100% | 100% | 0% |
| GLM-5.3 (Workers AI) | 61% | 78% | 19% | 46% | 73% | 48% | 33% | 72% | 44% | 58% | 67% | 100% | 100% | 67% |
Of the 42 known bugs both were scored on, both caught 31 and neither caught 1. Gemini 4 Argon caught 5 bugs that GLM-5.3 (Workers AI) missed: 1 in C#, 1 in Go, 1 in JavaScript, 1 in PHP and 1 in Ruby, most of them logic bugs. GLM-5.3 (Workers AI) caught 5 bugs that Gemini 4 Argon missed: 1 in C, 1 in Go, 1 in JavaScript, 1 in Rust and 1 in TypeScript.
On pull requests with no known bug, Gemini 4 Argon raised 1.1 false alarms per review and GLM-5.3 (Workers AI) 1.9. A measured review cost $0.0527 on Gemini 4 Argon, 70% more than $0.0311 on GLM-5.3 (Workers AI).
| Pull request | Language · kind | Gemini 4 Argon | GLM-5.3 (Workers AI) |
|---|---|---|---|
| dotnet/orleansfix(serialization): cap codec allocations | C# · Logic | 1/1 | 0/3 |
| go-chi/chifeat: middleware.ClientIP, a replacement for middleware.RealIP | Go · Security | 1/1 | 0/3 |
| rails/railsReimplement Action Cable redis adapter with redis-client | Ruby · Logic | 1/1 | 0/3 |
| sindresorhus/p-throttleAdd `weight` option | JavaScript · Logic | 1/1 | 0/3 |
| symfony/symfony[Security] Allow multiple OIDC discovery endpoints | PHP · Security | 1/1 | 0/3 |
| c-ares/c-aresEvent Thread could stall when not notified of new queries on existing connections that are in a bad state | C · Resource handling | 0/1 | 2/3 |
| colinhacks/zodfeat(v4): parse input containing reference cycles | TypeScript · Resource handling | 0/1 | 1/4 |
| golang/gocrypto/tls: add LocalCertificate to ConnectionState | Go · Logic | 0/1 | 1/4 |
| nodejs/undicifeat: add configurable maxPayloadSize for WebSocket | JavaScript · Security | 0/1 | 2/3 |
| nushell/nushellreorganize nushell configuration | Rust · Error handling | 0/1 | 1/4 |
Defects caught over all runs: a PR reviewed three times with one known bug shows 3/3 when it was caught every time.
Every bug each was scored on: Gemini 4 Argon and GLM-5.3 (Workers AI).