GPT-6 Luna vs Kimi K2.7 Code (Workers AI)
Reading a 26.2K-token pull request costs $0.0249 on Kimi K2.7 Code (Workers AI), 9.5× the $0.0026 it costs on GPT-6 Luna. GPT-6 Luna is a economy model and Kimi K2.7 Code (Workers AI) a mid-range one. In the benchmark GPT-6 Luna caught 30 percentage points more of the known defects than Kimi K2.7 Code (Workers AI) (95% interval +14 pts to +44 pts, a − b).
Side by side
| Figure | GPT-6 Luna | Kimi K2.7 Code (Workers AI) |
|---|---|---|
| Price tier | Economy | Mid-range |
| Bugs caughtshare of known bugs | 67% (better) | 38% |
| False alarmsper clean PR | 0.7 (better) | 2.6 |
| Cost per reviewmeasured | $0.0028 (better) | $0.0567 |
| Cost per bug caught | $0.0046 (better) | $0.0805 |
| Exact linecatches on the expected lines | 97% (better) | 79% |
| Review timemean | 29s (better) | 610s |
| Typical review calllist price | $0.0038 (better) | $0.0346 |
| Input / 1M tokens | $0.10 (better) | $0.95 |
| Output / 1M tokens | $0.50 (better) | $4.00 |
| Context window | 1.1M | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-6 Luna | 67% | 83% | 25% | 65% | 75% | 56% | 67% | 67% | 67% | 100% | 67% | 100% | 50% | 0% |
| 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 25 and neither caught 5. GPT-6 Luna caught 4 bugs that Kimi K2.7 Code (Workers AI) missed: 1 in Go, 1 in JavaScript, 1 in Ruby and 1 in Rust. Kimi K2.7 Code (Workers AI) caught 8 bugs that GPT-6 Luna missed: 3 in Go, 1 in C, 1 in Kotlin, 1 in PHP, 1 in Rust and 1 in TypeScript.
On pull requests with no known bug, GPT-6 Luna raised 0.7 false alarms per review and Kimi K2.7 Code (Workers AI) 2.6. A measured review cost $0.0028 on GPT-6 Luna, 95% less than $0.0567 on Kimi K2.7 Code (Workers AI).
| Pull request | Language · kind | GPT-6 Luna | Kimi K2.7 Code (Workers AI) |
|---|---|---|---|
| denoland/denoperf(libs/core): poll only ready handles and yield between I/O batches | Rust · Concurrency | 1/1 | 0/5 |
| go-chi/chifeat: middleware.ClientIP, a replacement for middleware.RealIP | Go · Security | 1/1 | 0/8 |
| pinojs/thread-streamrefactor: replace setTimeout with Atomics.waitAsync | JavaScript · Concurrency | 1/1 | 0/8 |
| rails/railsReimplement Action Cable redis adapter with redis-client | Ruby · Logic | 1/1 | 0/5 |
| 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 | 2/5 |
| go-gitea/giteaperf(gitdiff): optimize inline diff highlighting using cache | Go · Error handling | 0/1 | 1/4 |
| golang/gocrypto/tls: add LocalCertificate to ConnectionState | Go · Logic | 0/1 | 2/4 |
| kotest/kotestFix DataClassEq comparator | Kotlin · Logic | 0/1 | 1/7 |
| nushell/nushellreorganize nushell configuration | Rust · Error handling | 0/1 | 2/3 |
| symfony/symfony[Security] Allow multiple OIDC discovery endpoints | PHP · Security | 0/1 | 1/4 |
| traefik/traefikAdd the option to define custom cipher suites for backend serversTransport | Go · API misuse | 0/1 | 2/7 |
| withastro/astroPort Go's csrf protection | TypeScript · Logic | 0/1 | 3/3 |
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: GPT-6 Luna and Kimi K2.7 Code (Workers AI).