GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling high-context reasoning, codi…
Model details →OpenAI: GPT-5.4 vs xAI: Grok 4.20 Multi-Agent Beta
xAI: Grok 4.20 Multi-Agent Beta wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4.20 Multi-Agent Beta is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information across complex tasks…
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.4 | xAI: Grok 4.20 Multi-Agent Beta | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.1M | 2M | 🏆 xAI: Grok 4.20 Multi-Agent Beta |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.50 | $2.00 | 🏆 xAI: Grok 4.20 Multi-Agent Beta |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $15.00 | $6.00 | 🏆 xAI: Grok 4.20 Multi-Agent Beta |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | — | 🏆 OpenAI: GPT-5.4 |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.4 better than xAI: Grok 4.20 Multi-Agent Beta?
xAI: Grok 4.20 Multi-Agent Beta wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.4 and xAI: Grok 4.20 Multi-Agent Beta?
Input: $2.50 vs $2.00 per 1M tokens. Output: $15.00 vs $6.00 per 1M tokens.
What context windows do OpenAI: GPT-5.4 and xAI: Grok 4.20 Multi-Agent Beta support?
OpenAI: GPT-5.4 supports up to 1.1M tokens. xAI: Grok 4.20 Multi-Agent Beta supports up to 2M tokens.
Do both OpenAI: GPT-5.4 and xAI: Grok 4.20 Multi-Agent Beta support tool calling?
OpenAI: GPT-5.4: yes. xAI: Grok 4.20 Multi-Agent Beta: not advertised.