GPT-5.4-Cyber vs Grok-3
GPT-5.4-Cyber (2026) and Grok-3 (2025) are frontier-tier reasoning models from OpenAI and xAI. GPT-5.4-Cyber ships a not-yet-sourced context window, while Grok-3 ships a 131k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
GPT-5.4-Cyber is safer overall; choose Grok-3 when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | GPT-5.4-Cyber | Grok-3 |
|---|---|---|
| Best for | reasoning-heavy apps and multimodal apps | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Vision | Coding, RAG, and Agents |
| Context window | — | 131k |
| Cheapest output | - | $2.40/1M tokens |
| Provider routes | 0 tracked | 4 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Local decision data tags GPT-5.4-Cyber for Vision.
- Grok-3 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Grok-3 has broader tracked provider coverage for fallback and route flexibility.
- Grok-3 uniquely exposes JSON / Tool use and Structured outputs in local model data.
- Local decision data tags Grok-3 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-5.4-Cyber
Unavailable
No complete token price in local provider data
Grok-3
$1,240
Cheapest tracked route/tier: Chutes AI
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for GPT-5.4-Cyber and Grok-3; plan for SDK, billing, or endpoint changes.
- Grok-3 adds JSON / Tool use and Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Grok-3 and GPT-5.4-Cyber; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for JSON / Tool use and Structured outputs before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-14 | 2025-02-17 |
| Context window | — | 131k |
| Parameters | — | — |
| Architecture | Decoder Only | - |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-08 | 2025-04 |
Pricing and availability
| Pricing attribute | GPT-5.4-Cyber | Grok-3 |
|---|---|---|
| Input price | - | $0.80/1M tokens |
| Output price | - | $2.40/1M tokens |
| Providers | - |
Capabilities
| Capability | GPT-5.4-Cyber | Grok-3 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | No | Yes |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.