# Agents on Rails: Grok 4.6, GLM 5.3, Gemini 3.7 Flash, and Opus 4.8

DevFeed: [Agents on Rails: Grok 4.6, GLM 5.3, Gemini 3.7 Flash, and Opus 4.8](<https://devfeed.tech/articles/agents-on-rails-grok-4-6-glm-5-3-gemini-3-7-flash-and-opus-4-8-3558.md>)

Original publisher: [Read original article](<https://rubyonrails.org/2026/8/17/agents-on-rails-grok-4-6-glm-5-3-gemini-3-7-flash-and-opus-4-8>)

Author: Svyatoslav Kryukov, Artur Petrov

Published: 2026-08-17T00:00:00Z

Content type: news

Language: en

Sources: [Ruby on Rails: Compress the complexity of modern web apps](<https://devfeed.tech/sources/ruby-on-rails-compress-the-complexity-of-modern-web-apps.md>)

Topics: [Benchmark](<https://devfeed.tech/topics/benchmark.md>), [Rails](<https://devfeed.tech/topics/rails.md>), [Claude](<https://devfeed.tech/topics/claude.md>), [API](<https://devfeed.tech/topics/api.md>)

Tags: [agents](<https://devfeed.tech/tags/agents.md>), [benchmark](<https://devfeed.tech/tags/benchmark.md>), [bug](<https://devfeed.tech/tags/bug.md>), [claude](<https://devfeed.tech/tags/claude.md>), [leaderboard](<https://devfeed.tech/tags/leaderboard.md>), [models](<https://devfeed.tech/tags/models.md>), [traces](<https://devfeed.tech/tags/traces.md>)

## AI overview

Agents on Rails reports benchmark results for four newly added models: Grok 4.6, GLM 5.3, Claude Opus 4.8, and Gemini 3.7 Flash. Grok leads the newcomers with 52 of 63 completed runs, while Claude Opus 5 remains the overall leader at 58 of 63. The update also includes refreshed insights, an updated leaderboard, costs and recall rates, and full traces from the first two rounds.

## Source excerpt

Last week we launched Agents on Rails and published the first benchmark report. The response was immediate: suggestions, questions, model requests, and more than a few "but have you tried..." messages. We love the enthusiasm! We want this benchmark to be useful to you, so for this run we added four new models, updated the insights, and uploaded the full traces of the first two rounds (every command, diff, and verdict).