GLM-5.3 Flash (Workers AI) vs GPT-6.1 Sol
Reading a 26.2K-token pull request costs $0.0524 on GPT-6.1 Sol, 13× the $0.0039 it costs on GLM-5.3 Flash (Workers AI). GLM-5.3 Flash (Workers AI) is a economy model and GPT-6.1 Sol a mid-range one. The benchmark cannot separate their recall: GLM-5.3 Flash (Workers AI) minus GPT-6.1 Sol is −28 pts (95% interval −41 pts to −15 pts).
Side by side
| Figure | GLM-5.3 Flash (Workers AI) | GPT-6.1 Sol |
|---|---|---|
| Price tier | Economy | Mid-range |
| Bugs caughtshare of known bugs | 61% | 89% (better) |
| False alarmsper clean PR | 1.8 | 0.9 (better) |
| Cost per reviewmeasured | $0.0035 (better) | $0.0401 |
| Cost per bug caught | $0.0066 (better) | $0.0514 |
| Exact linecatches on the expected lines | 89% | 95% (better) |
| Review timemean | 254s | 28s (better) |
| Typical review calllist price | $0.0051 (better) | $0.0766 |
| Input / 1M tokens | $0.15 (better) | $2.00 |
| Output / 1M tokens | $0.50 (better) | $10.00 |
| Context window | 1M | 1.1M |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLM-5.3 Flash (Workers AI) | 61% | 57% | 31% | 45% | 88% | 30% | 67% | 89% | 33% | 78% | 67% | 67% | 100% | 67% |
| GPT-6.1 Sol | 89% | 83% | 75% | 70% | 100% | 89% | 100% | 100% | 100% | 100% | 100% | 100% | 50% | 100% |
Of the 42 known bugs both were scored on, both caught 32 and neither caught 1. GLM-5.3 Flash (Workers AI) caught 3 bugs that GPT-6.1 Sol missed: 1 in C++, 1 in Java and 1 in TypeScript, most of them concurrency bugs. GPT-6.1 Sol caught 6 bugs that GLM-5.3 Flash (Workers AI) missed: 2 in PHP, 2 in TypeScript, 1 in C# and 1 in Go.
On pull requests with no known bug, GLM-5.3 Flash (Workers AI) raised 1.8 false alarms per review and GPT-6.1 Sol 0.9. A measured review cost $0.0035 on GLM-5.3 Flash (Workers AI), 91% less than $0.0401 on GPT-6.1 Sol.
| Pull request | Language · kind | GLM-5.3 Flash (Workers AI) | GPT-6.1 Sol |
|---|---|---|---|
| ggml-org/llama.cpprpc : cache and reuse compute graphs | C++ · Security | 3/3 | 0/1 |
| trpc/trpcfix(server): pass maxDurationMs timeout signal to subscription handlers | TypeScript · Concurrency | 2/3 | 0/1 |
| jhy/jsoupStore cached child els in Attributes, not field | Java · Concurrency | 2/6 | 0/2 |
| TanStack/queryfix(query-core): fix hydration bugs for already resolved promises | TypeScript · Logic | 0/4 | 1/1 |
| colinhacks/zodfeat(v4): parse input containing reference cycles | TypeScript · Resource handling | 0/4 | 1/1 |
| doctrine/ormFix collection filtering API for IN/NOT IN comparisons that require type conversions | PHP · Logic | 0/3 | 1/1 |
| dotnet/orleansfix(serialization): cap codec allocations | C# · Logic | 0/3 | 1/1 |
| go-chi/chifeat: middleware.ClientIP, a replacement for middleware.RealIP | Go · Security | 0/3 | 1/1 |
| symfony/symfony[Security] Allow multiple OIDC discovery endpoints | PHP · Security | 0/3 | 1/1 |
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: GLM-5.3 Flash (Workers AI) and GPT-6.1 Sol.