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GPT-5.3 Codex vs Llama 4 Scout
A detailed comparison of GPT-5.3 Codex (OpenAI) and Llama 4 Scout (Meta) across pricing, performance, and features.
Pricing Comparison
| Metric | GPT-5.3 Codex | Llama 4 Scout | Difference |
|---|---|---|---|
| Input / 1M tokens | $2.00 | $0.18 | -91% |
| Output / 1M tokens | $16.00 | $0.63 | -96% |
| Context window | 200K | 10M | — |
| Max output | 65.536K | 32K | — |
Benchmark Comparison
| Benchmark | GPT-5.3 Codex | Llama 4 Scout |
|---|---|---|
| MMLU-Pro | 90% | 74.2% |
| HumanEval | 96.5% | 86% |
| GPQA | 78% | — |
Capabilities
| Capability | GPT-5.3 Codex | Llama 4 Scout |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✗ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✗ |
| vision | ✓ | ✓ |
GPT-5.3 Codex Strengths
- ✓Best coding model from OpenAI
- ✓Large output window (65K tokens)
- ✓Strong reasoning for complex tasks
GPT-5.3 Codex Weaknesses
- ✗API access not yet available
- ✗Premium pricing
Llama 4 Scout Strengths
- ✓10M token context — largest available
- ✓Open-source
- ✓Ultra cheap via API providers
Llama 4 Scout Weaknesses
- ✗Lower benchmarks than Maverick
- ✗Limited tool-use support
Quick Verdict
Best value: Llama 4 Scout is the more affordable option at $0.18/$0.63 per 1M tokens.
Higher benchmarks: GPT-5.3 Codex scores higher on average across available benchmarks (88.2% avg).
Larger context: Llama 4 Scout supports 10M tokens.
Choose Llama 4 Scout if cost matters most. Choose GPT-5.3 Codex if you need the best possible quality for complex tasks.