Key Takeaways
Mixtral 8x22B Instruct wins:
- Cheaper output tokens
GPT-5 Codex wins:
- Cheaper input tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Supports tool calls
Price Advantage
Mixtral 8x22B Instruct
Benchmark Advantage
GPT-5 Codex
Context Window
GPT-5 Codex
Speed
GPT-5 Codex
Pricing Comparison
Price Comparison
| Metric | Mixtral 8x22B Instruct | GPT-5 Codex | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $2.00 | $1.25 | GPT-5 Codex |
| Output (per 1M tokens) | $6.00 | $10.00 | Mixtral 8x22B Instruct |
| Cache Read (per 1M) | N/A | $125000.00 | GPT-5 Codex |
Using a 3:1 input/output ratio, Mixtral 8x22B Instruct is 13% cheaper overall.
Mixtral 8x22B Instruct Providers
Vercel $1.20 (Cheapest)
Fireworks $1.20 (Cheapest)
Mistral $2.00
GPT-5 Codex Providers
OpenAI $1.25 (Cheapest)
Benchmark Comparison
7
Benchmarks Compared
0
Mixtral 8x22B Instruct Wins
4
GPT-5 Codex Wins
Benchmark Scores
| Benchmark | Mixtral 8x22B Instruct | GPT-5 Codex | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 9.8 | 44.5 | |
Coding Index Code generation & understanding | - | 38.9 | - |
Math Index Mathematical reasoning | - | 98.7 | - |
MMLU Pro Academic knowledge | 53.7 | 86.5 | |
GPQA Graduate-level science | 33.2 | 83.7 | |
LiveCodeBench Competitive programming | 14.8 | 84.0 | |
AIME Competition math | 0.0 | - | - |
GPT-5 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
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Mixtral 8x22B Instruct
Other models
Context & Performance
Context Window
Mixtral 8x22B Instruct
65,536
tokens
GPT-5 Codex
400,000
tokens
Max output: 128,000 tokens
GPT-5 Codex has a 84% larger context window.
Speed Performance
| Metric | Mixtral 8x22B Instruct | GPT-5 Codex | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 314.7 tok/s | |
| Time to First Token | 0.00s | 10.95s |
GPT-5 Codex responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | Mixtral 8x22B Instruct | GPT-5 Codex |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Mixtral 8x22B Instruct | GPT-5 Codex |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Mistral AI | OpenAI |
| Released | Apr 2024 | Sep 2025 |
Mixtral 8x22B Instruct Modalities
Input
text
Output
text
GPT-5 Codex Modalities
Input
textimage
Output
text