GPT-5.5 Pro vs Llama 4 Scout
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
OpenAI · Apr 2026
The maximum-compute tier of GPT-5.5 for the hardest research, math and engineering problems, at a steep per-token premium.
Meta · Apr 2025
A 10M-token context window — still the largest ever shipped — in a 109B MoE that fits on a single H100.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Llama 4 Scout works out roughly 239x cheaper per blended million tokens. Llama 4 Scout also takes 10M of context versus 1M for GPT-5.5 Pro. And Llama 4 Scout is open-weights (Llama 4 Community License), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Specs & pricing
| GPT-5.5 Pro | Llama 4 Scout | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $30 | $0.18 |
| Output price / 1M | $180 | $0.59 |
| Context window | 1M | 10M |
| Max output | 128K | — |
| Open weights | no | yes (Llama 4 Community License) |
| Reasoning model | yes | no |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Jan 2026 | Aug 2024 |
| Released | Apr 2026 | Apr 2025 |
| Example monthly cost* | $570.00 | $2.68 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, GPT-5.5 Pro or Llama 4 Scout?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Llama 4 Scout works out roughly 239x cheaper per blended million tokens. Llama 4 Scout also takes 10M of context versus 1M for GPT-5.5 Pro. And Llama 4 Scout is open-weights (Llama 4 Community License), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, GPT-5.5 Pro or Llama 4 Scout?
- GPT-5.5 Pro costs $30/$180 per million input/output tokens, while Llama 4 Scout costs $0.18/$0.59. For a typical workload of 10M input and 1.5M output tokens per month, that's $570.00 versus $2.68.
- Which model is better for coding, GPT-5.5 Pro or Llama 4 Scout?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.