GPT-5.1-Codex-Mini vs Grok 4.20 Multi-Agent
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose GPT-5.1-Codex-Mini if you need
- ✓Choose GPT-5.1-Codex-Mini if you need strong coding specialization with native image+text support.
- ✓Choose GPT-5.1-Codex-Mini if you need a documented output speed of 214.62 t/s at $2 per million tokens.
- ✓Choose GPT-5.1-Codex-Mini if you need a 400k context window for extended technical workflows.
- ✓Choose GPT-5.1-Codex-Mini if you need a known intelligence_index of 38.6.
Choose Grok 4.20 Multi-Agent if you need
- ✓Choose Grok 4.20 Multi-Agent if you need a 2M-token context for massive context tasks.
- ✓Choose Grok 4.20 Multi-Agent if you need multi-agent coordination across text, images, and files.
- ✓Choose Grok 4.20 Multi-Agent if you need native handling of files in addition to images.
- ✓Choose Grok 4.20 Multi-Agent if you need extremely long contexts beyond 400k tokens.
Verdict
GPT-5.1-Codex-Mini leads on known speed (214.62 t/s), lower price ($2/1M), and coding specialization with a 400k context, while Grok 4.20 Multi-Agent leads on raw context size (2M tokens) and native multi-agent coordination for complex workflows. GPT-5.1-Codex-Mini offers measurable performance advantages where data exists; Grok 4.20 Multi-Agent provides greater scale for massive-context tasks but at double the cost and with unknown speed or intelligence metrics. Neither dominates across all dimensions given the missing values for Grok.
GPT-5.1-Codex-Mini vs Grok 4.20 Multi-Agent: side by side
| Spec | GPT-5.1-Codex-Mini | Grok 4.20 Multi-Agent | Winner |
|---|---|---|---|
| Intelligence | 38.6 | — | Tie |
| Output speed | 215 t/s | — | Tie |
| Output price | $2.00/1M | $6.00/1M | GPT-5.1-Codex-Mini |
| Context | 400K | 2000K | Grok 4.20 Multi-Agent |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | xAI | Tie |
Detailed analysis
Context Window
Winner: Grok 4.20 Multi-AgentGrok 4.20 Multi-Agent provides a 2,000,000-token context compared to GPT-5.1-Codex-Mini's 400,000 tokens. This gives Grok a clear advantage for extremely long-context tasks. GPT-5.1-Codex-Mini still offers a very large window but is outscaled by a factor of five.
Pricing
Winner: GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini is priced at $2 per million tokens while Grok 4.20 Multi-Agent costs $6 per million tokens. The OpenAI model is three times cheaper on output. No other pricing details are provided for either model.
Speed & Intelligence
Winner: GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini reports an output speed of 214.62 t/s and intelligence_index of 38.6. Grok 4.20 Multi-Agent lists neither metric. The available data therefore favors GPT-5.1-Codex-Mini on measurable performance.
Workflow Features
Winner: TieGPT-5.1-Codex-Mini emphasizes coding specialization and extended technical workflows with image+text support. Grok 4.20 Multi-Agent emphasizes multi-agent coordination and native file handling. Each model targets different workflow strengths without direct overlap in the given facts.
GPT-5.1-Codex-Mini
Pros
- +Very large context window
- +Strong coding specialization
- +Native image + text support
- +Suitable for extended technical workflows
Cons
- –Mini variant may have reduced depth on complex reasoning
- –Limited to image and text modalities
- –Trade-off between context size and response speed
Grok 4.20 Multi-Agent
Pros
- +Supports extremely long contexts
- +Coordinates multiple agents for workflows
- +Handles text, images, and files natively
Cons
- –Multi-agent setups may add latency
- –Coordination overhead on simple tasks
- –No audio or video modalities
Summary: GPT-5.1-Codex-Mini vs Grok 4.20 Multi-Agent
Select GPT-5.1-Codex-Mini when speed, price, and coding focus matter most. Select Grok 4.20 Multi-Agent when maximum context length and multi-agent orchestration are required. The choice hinges on whether the 2M context and agent coordination outweigh the higher cost and unknown performance metrics.
Frequently asked questions
GPT-5.1-Codex-Mini is better where speed, price, and coding metrics are known; Grok 4.20 Multi-Agent is better for maximum context size and multi-agent workflows.