| Signal | GPT-5.4 | Delta | Grok 4 Fast |
|---|---|---|---|
Capabilities | 86 | -- | |
Context window size | 96 | -4 | |
Output Capacity | 85 | +11 | |
Pricing Tier | 15 | +15 | |
Recency | 100 | -- | |
Versatility | 67 | +17 | |
| Overall Result | 3 wins | of 6 | 1 wins |
28
days ranked higher
2
days
0
days ranked higher
OpenAI
xAI
Grok 4 Fast saves you $955.00/month
That's $11460.00/year compared to GPT-5.4 at your current usage level of 100K calls/month.
| Metric | GPT-5.4 | Grok 4 Fast | Winner |
|---|---|---|---|
| Overall Score | 70 | 64 | GPT-5.4 |
| Rank | #11 | #37 | GPT-5.4 |
| Quality Rank | #11 | #37 | GPT-5.4 |
| Adoption Rank | #11 | #37 | GPT-5.4 |
| Parameters | -- | -- | -- |
| Context Window | 1050K | 2000K | Grok 4 Fast |
| Pricing | $2.50/$15.00/M | $0.20/$0.50/M | -- |
| Signal Scores | |||
| Capabilities | 86 | 86 | GPT-5.4 |
| Context window size | 96 | 100 | Grok 4 Fast |
| Output Capacity | 85 | 75 | GPT-5.4 |
| Pricing Tier | 15 | 1 | GPT-5.4 |
| Recency | 100 | 100 | GPT-5.4 |
| Versatility | 67 | 50 | GPT-5.4 |
GPT-5.4 has a moderate advantage with a 5.700000000000003-point lead in composite score. It wins on more signal dimensions, but Grok 4 Fast has specific strengths that could make it the better choice for certain workflows.
Best for Quality
GPT-5.4
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4 Fast
96% lower pricing; better value at scale
Best for Reliability
GPT-5.4
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.4
Stronger community support and better developer experience
Best for Production
GPT-5.4
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.4 | Grok 4 Fast |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
OpenAI
xAI
Grok 4 Fast saves you $21.54/month
That's 96% cheaper than GPT-5.4 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.4 | Grok 4 Fast |
|---|---|---|
| Context Window | 1.1M | 2M |
| Max Output Tokens | 128,000 | 30,000 |
| Open Source | No | No |
| Created | Mar 5, 2026 | Sep 19, 2025 |
GPT-5.4 currently scores higher (70 vs 64), but the best choice depends on your specific use case, budget, and requirements.
GPT-5.4 is ranked #11 and Grok 4 Fast is ranked #37. Rankings are based on a composite score from multiple signals including benchmarks, community sentiment, and adoption metrics.
Compare the detailed pricing breakdown above to see which model offers better value for your usage pattern.