Model Comparison
GPT-5 (High)
vs. Grok 3
GPT-5 (High) has not been available at LLMBase since 26 October 2026. Open alternative: DeepSeek V4 Pro →
Comparing 2 AI models · 0 benchmarks · OpenAI, SpaceXAI
Recommended Pick
OpGPT-5 (High)4 metric winsStrongest on: Input price, Output price, Blended price
Lowest Price
GPT-5 (High)
$1.25/1M input price
Differences That Matter
Price gap
GPT-5 (High) is 2.4x cheaper on input tokens than Grok 3.
Speed gap
GPT-5 (High) generates about 1.4x as many tokens per second as Grok 3.
Top-pick rationale
GPT-5 (High) wins 4 measurable categories, including Input price, Output price, Blended price, Throughput.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5 (High)
OpenAI
TTFT
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Time
—
tok/s
—
Tokens
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Cost
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Grok 3
SpaceXAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick Op GPT-5 (High) | Sp Grok 3 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.25/1M | $3.00/1M |
| Output Cost | $10.00/1M | $15.00/1M |
| Blended (3:1) | $3.44/1M | $6.00/1M |
| Specifications | ||
| Organization | OpenAI | SpaceXAI |
| Release Date | Aug 7, 2025 | Feb 19, 2025 |
| Performance & Speed | ||
| Throughput | 109.2 tok/s | 75.4 tok/s |
| TTFT | 100790ms | 1420ms |
| Latency | 100790ms | 1420ms |
Key Takeaways
GPT-5 (High) offers the best value at $1.25/1M,making it ideal for high-volume applications and cost-conscious projects.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
GPT-5 (High)
- Cost-sensitive applications
- High-volume processing
Grok 3
- General-purpose AI
- Versatile applications
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