Key Takeaways
Gemma 2 27B wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5 Codex wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Supports tool calls
Price Advantage
Gemma 2 27B
Benchmark Advantage
GPT-5 Codex
Context Window
GPT-5 Codex
Speed
GPT-5 Codex
Pricing Comparison
Price Comparison
| Metric | Gemma 2 27B | GPT-5 Codex | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.65 | $1.25 | Gemma 2 27B |
| Output (per 1M tokens) | $0.65 | $10.00 | Gemma 2 27B |
| Cache Read (per 1M) | N/A | $125000.00 | GPT-5 Codex |
Using a 3:1 input/output ratio, Gemma 2 27B is 81% cheaper overall.
Gemma 2 27B Providers
NextBit $0.65 (Cheapest)
GPT-5 Codex Providers
OpenAI $1.25 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Gemma 2 27B Wins
3
GPT-5 Codex Wins
Benchmark Scores
| Benchmark | Gemma 2 27B | GPT-5 Codex | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 36.2 | 44.5 | |
Coding Index Code generation & understanding | - | 38.9 | - |
Math Index Mathematical reasoning | - | 98.7 | - |
MMLU Pro Academic knowledge | 38.4 | 86.5 | |
GPQA Graduate-level science | 16.7 | 83.7 | |
LiveCodeBench Competitive programming | - | 84.0 | - |
Aider Real-world code editing | 36.1 | - | - |
BBH Big-Bench Hard | 49.3 | - | - |
GPT-5 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
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Y-axis:
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Gemma 2 27B
Other models
Context & Performance
Context Window
Gemma 2 27B
8,192
tokens
Max output: 2,048 tokens
GPT-5 Codex
400,000
tokens
Max output: 128,000 tokens
GPT-5 Codex has a 98% larger context window.
Speed Performance
| Metric | Gemma 2 27B | GPT-5 Codex | Winner |
|---|---|---|---|
| Tokens/second | N/A | 338.6 tok/s | |
| Time to First Token | N/A | 14.88s |
Capabilities
Feature Comparison
| Feature | Gemma 2 27B | GPT-5 Codex |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Gemma 2 27B | GPT-5 Codex |
|---|---|---|
| License | Open Source | Proprietary |
| Author | OpenAI | |
| Released | Jul 2024 | Sep 2025 |
Gemma 2 27B Modalities
Input
text
Output
text
GPT-5 Codex Modalities
Input
textimage
Output
text