GPT-4o vs Llama 4 405B
A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.
Updated
GPT-4o specs · Llama 4 405B specs- PriceGPT-4o
GPT-4o publishes pricing ($10.00 / 1M output tokens) while Llama 4 405B does not.
- Context windowLlama 4 405B
Llama 4 405B accepts 256K tokens vs 128K, 2.0× the room for long documents and codebases.
- BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
- ModalitiesGPT-4o
GPT-4o supports 3 modalities (text, vision, audio) vs 2 for Llama 4 405B.
- OpennessLlama 4 405B
Llama 4 405B ships open weights (Llama 4 Community License); GPT-4o is API-only.
It's a genuine coin-flip between GPT-4o and Llama 4 405B: 2 category wins each, with the rest tied. GPT-4o publishes pricing ($10.00 / 1M output tokens) while Llama 4 405B does not. Llama 4 405B accepts 256K tokens vs 128K, 2.0× the room for long documents and codebases.
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, GPT-4o handles text, vision, audio while Llama 4 405B handles text, vision, which can be the deciding factor before you even look at benchmarks. Llama 4 405B ships open weights (Llama 4 Community License); GPT-4o is API-only.
Llama 4 405B is the newer of the two, released 11 months after GPT-4o, which usually means a more recent knowledge cutoff and updated safety post-training. GPT-4o is usually picked for chatbots and vision workloads, while Llama 4 405B sees more deployments in open source llm and fine tuning. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.
Side-by-side specs
| Spec | GPT-4o | Llama 4 405B |
|---|---|---|
| Provider | OpenAI | Meta |
| Released | May 2024 | Apr 2025 |
| Modalities | text, vision, audio | text, vision |
| Context window | 128K tokens | 256K tokens |
| Max output | , | , |
| Input · 1M | $2.50 / 1M tokens | Pricing not published |
| Output · 1M | $10.00 / 1M tokens | Pricing not published |
| Knowledge cutoff | 2023-10 | 2024-12 |
| Open weights | No | Yes (Llama 4 Community License) |
| API available | Yes | Yes |
Pricing at scale
What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.
- Light usage, 100k in / 50k out per day$22.50 vs ,
- Heavy usage, 1M in / 500k out per day$225 vs ,
- RAG workload, 5M in / 200k out per day$435 vs ,
Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- GPT-4o$0.750
- Llama 4 405BPricing unavailable
Benchmarks compared
Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.
- MMLU88.7
- HumanEval90.2
GPT-4o fits when…
- Native multimodal
- Mature SDK and tooling
- Multimodal needs covering audio.
Llama 4 405B fits when…
- Strongest open-weight model at launch
- Multimodal (text + vision)
- Wide hosting availability
- Long-context tasks, handles 256K tokens vs 128K for GPT-4o.
- Self-hosting and on-prem requirements, open weights (Llama 4 Community License).
Consider GPT-5.5
OpenAI's mid-cycle GPT-5 refresh, improved reasoning, tool use, and multimodal grounding over the 2025 launch.
Frequently asked
Is GPT-4o or Llama 4 405B cheaper?
Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.Which has the larger context window?
Llama 4 405B accepts 256K tokens vs 128K for GPT-4o.Is GPT-4o or Llama 4 405B better for coding?
Both GPT-4o and Llama 4 405B are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.Are either of these models open source?
Llama 4 405B ships open weights (Llama 4 Community License). GPT-4o is API-only.When were GPT-4o and Llama 4 405B released?
GPT-4o was released by OpenAI on 2024-05-13. Llama 4 405B was released by Meta on 2025-04-05.
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