Llama 4 405B vs GPT-5 Mini for javascript: which is better in 2026?
A head-to-head look at Llama 4 405B and GPT-5 Mini for javascript. Benchmarks via artificialanalysis.ai, pricing as of May 2026. Compare AI models like these inside Admix.
Quick verdict
For javascript in May 2026, Llama 4 405B edges out GPT-5 Mini on the codingIndex metric. Best fully open-weights model.
Side-by-side specs
| Spec | Llama | GPT-5 Mini |
|---|---|---|
| Intelligence index | 71.5 | 64.5 |
| Coding index | 69.0 | 61.0 |
| Context window | 256K tokens | 200K tokens |
| Speed (tok/s) | 95 | 220 |
| Input $/M | $0.90 | $0.25 |
| Output $/M | $2.70 | $1.00 |
| Released | Nov 5, 2025 | Sep 10, 2025 |
How they handle javascript
Llama 4 405B: Best fully open-weights model. The main caveat is trails closed flagships on coding.
GPT-5 Mini: Excellent quality-to-price ratio. The main caveat is behind flagships on hard reasoning.
Cost per 1,000 queries
Assuming 1,500 input and 800 output tokens per query:
- Llama 4 405B: $3.51 per 1,000 queries
- GPT-5 Mini: $1.18 per 1,000 queries
Verdict by sub-task
- Best raw quality on javascript:
- Best price: GPT-5 Mini
- Longest context: Llama 4 405B
- Fastest: GPT-5 Mini
FAQ
Is Llama 4 405B better than GPT-5 Mini for javascript?
On May 2026 benchmarks (artificialanalysis.ai), Llama 4 405B ranks higher than GPT-5 Mini for javascript on the codingIndex metric. The gap is small enough that the choice often comes down to price, context length, and tone.
Which is cheaper, Llama 4 405B or GPT-5 Mini?
Llama 4 405B costs $0.90 input and $2.70 output per million tokens. GPT-5 Mini costs $0.25 input and $1.00 output per million tokens.
Can I use both Llama and GPT-5 Mini in one app?
Yes. Admix is a multi model AI chat aggregator that lets you run Llama 4 405B and GPT-5 Mini side by side under one subscription.
Sources
Benchmarks from artificialanalysis.ai (May 2026).
Related
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