Model Comparison
Mixtral 8x7B Instruct
vs. GPT-5.3 Codex (xhigh)
Comparing 2 AI models · 11 benchmarks · Mistral, OpenAI
Recommended Pick
Op GPT-5.3 Codex (xhigh) 6 metric wins Strongest on: Throughput, Reasoning, Intelligence
Best Value
Mixtral 8x7B Instruct
100.0 value score
13.2 reasoning / $0.51/1M
Lowest Price
Mixtral 8x7B Instruct
$0.45/1M input price
Best Reasoning
GPT-5.3 Codex (xhigh)
58.6 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Mixtral 8x7B Instruct has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Mixtral 8x7B Instruct is 3.9x cheaper on input tokens than GPT-5.3 Codex (xhigh).
Reasoning gap
GPT-5.3 Codex (xhigh) leads Mixtral 8x7B Instruct by 45.4 points on reasoning.
Top-pick rationale
GPT-5.3 Codex (xhigh) wins 6 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Mixtral 8x7B Instruct
Mistral
TTFT
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Time
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tok/s
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Tokens
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Cost
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GPT-5.3 Codex (xhigh)
OpenAI
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Mi Mixtral 8x7B Instruct | Top Pick Op GPT-5.3 Codex (xhigh) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.45/1M | $1.75/1M |
| Output Cost | $0.70/1M | $14.00/1M |
| Blended (3:1) | $0.51/1M | $4.81/1M |
| Specifications | ||
| Organization | Mistral | OpenAI |
| Release Date | Dec 11, 2023 | Feb 5, 2026 |
| Performance & Speed | ||
| Throughput | — | 96.9 tok/s |
| TTFT | — | 57480ms |
| Latency | — | 57480ms |
| Composite Indices | ||
| Value Score | 100.0 | 47.2 |
| Reasoning Score | 13.2 | 58.6 |
| Intelligence | 2.4 | 44.3 |
| Standard Benchmarks | ||
| GPQA | 29.2% | 91.5% |
| MMLU Pro | 38.7% | — |
| HLE | 4.5% | 39.9% |
| LiveCodeBench | 6.6% | — |
| MATH 500 | 29.9% | — |
| AIME (Original) | 0.0% | — |
| SciCode | 2.8% | 53.2% |
| LCR | — | 74.0% |
| IFBench | — | 75.4% |
| TAU-bench v2 | — | 86.0% |
| TerminalBench Hard | — | 53.0% |
Key Takeaways
Mixtral 8x7B Instruct offers the best value at $0.45/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.3 Codex (xhigh) has the strongest reasoning profile with a 58.6 reasoning score, combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Mixtral 8x7B Instruct
- Cost-sensitive applications
- High-volume processing
GPT-5.3 Codex (xhigh)
- Complex reasoning tasks
- Research & analysis
