Grok 4.5
A large language model in the Grok series released by xAI, included in comparative benchmarking evaluations of AI coding capabilities.
Core Facts
Timeline (last 90 days)
Questions for which all retries still failed were scored as incorrect rather than discarded; the author speculates that Grok 4.5's score of 0.00 was most likely caused by an infrastructure failure, but this has not been conclusively confirmed.
Musk hyped the release of Grok 4.7 for more than a month and claimed at the time of Grok 4.5's launch that 4.7 would surpass all current models.
Model selection strategy: use Composer 2.5 for simple web tasks, Grok 4.5 for moderately challenging tasks, and switch to advanced models such as GPT 5.6 or Fable when the first two cannot handle the task.
The Grok 4.5 model was trained in collaboration with SpaceX using its computing resources directly, and its price per token is much cheaper than comparable models such as GPT 5.6.
Grok 4.6 performs excellently across various benchmarks, with a per-token price equal to that of 4.5.
Zed v1.18.0 adds Gemini 3.5 Flash-Lite on the Google AI side, and Grok 4.5 and Grok 4.6 on the xAI side.
Grok 4.6 is an iterative upgrade (dot upgrade) based on Grok 4.5, not a newly trained model.
The user stated that Grok 4.6 consumes quota much faster than Grok 4.5.
A Cursor user posted on Reddit complaining that Grok 4.5 was automatically switched to 4.6, stating that the model selector reverts to 4.6 automatically when a new conversation is started.
Grok 4.5's performance may be slightly inferior, but it consumes only a fraction of the tokens that Sol or Fable does.
5 more timeline events
All Facts (6)
Grok 4.5 is from xAI and is positioned as a high-end model.
75%UnverifiedQuestions for which all retries still failed were scored as incorrect rather than discarded; the author speculates that Grok 4.5's score of 0.00 was most likely caused by an infrastructure failure, but this has not been conclusively confirmed.
50%UnverifiedThe Grok 4.5 model was trained in collaboration with SpaceX using its computing resources directly, and its price per token is much cheaper than comparable models such as GPT 5.6.
50%UnverifiedModel selection strategy: use Composer 2.5 for simple web tasks, Grok 4.5 for moderately challenging tasks, and switch to advanced models such as GPT 5.6 or Fable when the first two cannot handle the task.
50%UnverifiedGrok 4.6 is an iterative upgrade (dot upgrade) based on Grok 4.5, not a newly trained model.
50%UnverifiedZed v1.18.0 adds Gemini 3.5 Flash-Lite on the Google AI side, and Grok 4.5 and Grok 4.6 on the xAI side.
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