GLM-5.3 (Workers AI) vs GLM-5.3 Flash (Workers AI)
Reading a 26.2K-token pull request costs $0.0367 on GLM-5.3 (Workers AI), 9.3× the $0.0039 it costs on GLM-5.3 Flash (Workers AI). GLM-5.3 (Workers AI) is a mid-range model and GLM-5.3 Flash (Workers AI) a economy one. The benchmark cannot separate their recall: GLM-5.3 (Workers AI) minus GLM-5.3 Flash (Workers AI) is 0 pts (95% interval −9 pts to +9 pts).
Side by side
| Figure | GLM-5.3 (Workers AI) | GLM-5.3 Flash (Workers AI) |
|---|---|---|
| Price tier | Mid-range | Economy |
| Bugs caughtshare of known bugs | 61% (better) | 61% |
| False alarmsper clean PR | 1.9 | 1.8 (better) |
| Cost per reviewmeasured | $0.0311 | $0.0035 (better) |
| Cost per bug caught | $0.0559 | $0.0066 (better) |
| Exact linecatches on the expected lines | 85% | 89% (better) |
| Review timemean | 65s (better) | 254s |
| Typical review calllist price | $0.0473 | $0.0051 (better) |
| Input / 1M tokens | $1.40 | $0.15 (better) |
| Output / 1M tokens | $4.40 | $0.50 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLM-5.3 (Workers AI) | 61% | 78% | 19% | 46% | 73% | 48% | 33% | 72% | 44% | 58% | 67% | 100% | 100% | 67% |
| GLM-5.3 Flash (Workers AI) | 61% | 57% | 31% | 45% | 88% | 30% | 67% | 89% | 33% | 78% | 67% | 67% | 100% | 67% |
Of the 42 known bugs both were scored on, both caught 33 and neither caught 4. GLM-5.3 (Workers AI) caught 3 bugs that GLM-5.3 Flash (Workers AI) missed: 2 in TypeScript and 1 in PHP, most of them logic bugs. GLM-5.3 Flash (Workers AI) caught 2 bugs that GLM-5.3 (Workers AI) missed: 1 in JavaScript and 1 in Ruby, all of them logic bugs.
On pull requests with no known bug, GLM-5.3 (Workers AI) raised 1.9 false alarms per review and GLM-5.3 Flash (Workers AI) 1.8. A measured review cost $0.0311 on GLM-5.3 (Workers AI), 8.8× the cost of $0.0035 on GLM-5.3 Flash (Workers AI).
| Pull request | Language · kind | GLM-5.3 (Workers AI) | GLM-5.3 Flash (Workers AI) |
|---|---|---|---|
| TanStack/queryfix(query-core): fix hydration bugs for already resolved promises | TypeScript · Logic | 3/4 | 0/4 |
| doctrine/ormFix collection filtering API for IN/NOT IN comparisons that require type conversions | PHP · Logic | 1/3 | 0/3 |
| colinhacks/zodfeat(v4): parse input containing reference cycles | TypeScript · Resource handling | 1/4 | 0/4 |
| rails/railsReimplement Action Cable redis adapter with redis-client | Ruby · Logic | 0/3 | 2/3 |
| sindresorhus/p-throttleAdd `weight` option | JavaScript · Logic | 0/3 | 2/3 |
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 (Workers AI) and GLM-5.3 Flash (Workers AI).