GLM-5.3 Flash (Workers AI) vs Kimi K2.7 Code (Workers AI)
Reading a 26.2K-token pull request costs $0.0249 on Kimi K2.7 Code (Workers AI), 6.3× the $0.0039 it costs on GLM-5.3 Flash (Workers AI). GLM-5.3 Flash (Workers AI) is a economy model and Kimi K2.7 Code (Workers AI) a mid-range one. In the benchmark GLM-5.3 Flash (Workers AI) caught 23 percentage points more of the known defects than Kimi K2.7 Code (Workers AI) (95% interval +11 pts to +35 pts, a − b).
Side by side
| Figure | GLM-5.3 Flash (Workers AI) | Kimi K2.7 Code (Workers AI) |
|---|---|---|
| Price tier | Economy | Mid-range |
| Bugs caughtshare of known bugs | 61% (better) | 38% |
| False alarmsper clean PR | 1.8 (better) | 2.6 |
| Cost per reviewmeasured | $0.0035 (better) | $0.0567 |
| Cost per bug caught | $0.0066 (better) | $0.0805 |
| Exact linecatches on the expected lines | 89% (better) | 79% |
| Review timemean | 254s (better) | 610s |
| Typical review calllist price | $0.0051 (better) | $0.0346 |
| Input / 1M tokens | $0.15 (better) | $0.95 |
| Output / 1M tokens | $0.50 (better) | $4.00 |
| Context window | 1M | 262.1K |
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% |
| Kimi K2.7 Code (Workers AI) | 38% | 75% | 26% | 31% | 46% | 19% | 8% | 14% | 42% | 62% | 33% | 46% | 6% | 40% |
Of the 42 known bugs both were scored on, both caught 28 and neither caught 2. GLM-5.3 Flash (Workers AI) caught 7 bugs that Kimi K2.7 Code (Workers AI) missed: 2 in JavaScript, 2 in Ruby, 1 in C++, 1 in Java and 1 in Rust, most of them concurrency bugs. Kimi K2.7 Code (Workers AI) caught 5 bugs that GLM-5.3 Flash (Workers AI) missed: 2 in PHP, 2 in TypeScript 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 Kimi K2.7 Code (Workers AI) 2.6. A measured review cost $0.0035 on GLM-5.3 Flash (Workers AI), 94% less than $0.0567 on Kimi K2.7 Code (Workers AI).
| Pull request | Language · kind | GLM-5.3 Flash (Workers AI) | Kimi K2.7 Code (Workers AI) |
|---|---|---|---|
| denoland/denoperf(libs/core): poll only ready handles and yield between I/O batches | Rust · Concurrency | 3/3 | 0/5 |
| ggml-org/llama.cpprpc : cache and reuse compute graphs | C++ · Security | 3/3 | 0/5 |
| rails/railsReimplement Action Cable redis adapter with redis-client | Ruby · Logic | 2/3 | 0/5 |
| sindresorhus/p-throttleAdd `weight` option | JavaScript · Logic | 2/3 | 0/8 |
| jhy/jsoupStore cached child els in Attributes, not field | Java · Concurrency | 2/6 | 0/16 |
| pinojs/thread-streamrefactor: replace setTimeout with Atomics.waitAsync | JavaScript · Concurrency | 1/3 | 0/8 |
| socketry/asyncBarrier wait in completion order + `Queue#close`. | Ruby · Concurrency | 1/3 | 0/5 |
| TanStack/queryfix(query-core): fix hydration bugs for already resolved promises | TypeScript · Logic | 0/4 | 2/3 |
| colinhacks/zodfeat(v4): parse input containing reference cycles | TypeScript · Resource handling | 0/4 | 1/3 |
| doctrine/ormFix collection filtering API for IN/NOT IN comparisons that require type conversions | PHP · Logic | 0/3 | 1/4 |
| go-gitea/giteaperf(gitdiff): optimize inline diff highlighting using cache | Go · Error handling | 0/3 | 1/4 |
| symfony/symfony[Security] Allow multiple OIDC discovery endpoints | PHP · Security | 0/3 | 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: GLM-5.3 Flash (Workers AI) and Kimi K2.7 Code (Workers AI).