Llama 3.1 8B vs o3
At a Glance
| Compare |  Llama 3.1 8BMeta |  o3OpenAI |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $1.00Openrouter ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $4.00Openrouter ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 131K | 200K |
| Model facts checked | Aug 28, 2026View model evidence → | Sep 3, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Llama-3.1-8B | o3 |
|---|---|---|
| Developer | Meta | OpenAI |
| Family | Llama 3 1 8b | O3 |
| Model | Llama-3.1-8B | o3 |
| Version | Llama-3.1-8B | o3 |
| Lifecycle | active | active |
| Released | 2024-07-23 | 2025-04-16 |
| Knowledge cutoff | Unknown | 2024-06-01 |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 131K | 200K |
| Total parameters | 8B | Unknown |
| Active parameters | Unknown | Unknown |
| License | llama3.1 | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Hugging Face (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | generation | chat, generation, reasoning, structured_outputs, tools |
Llama 3.1 8B Capabilities
o3 Capabilities
Related Comparisons
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|---|---|---|---|
Llama-3.1-8BMeta | vs | GPT-6 AstraOpenAI | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs | Llama-3.1-8BMeta | cross-developer peerstext |
 Gemini 3.1 ProGoogle DeepMind | vs | Llama-3.1-8BMeta | cross-developer peerstext |
 DeepSeek-V4.1-FlashDeepSeek | vs | Llama-3.1-8BMeta | cross-developer peerstext |
Llama-3.1-8BMeta | vs | Grok 4.6xAI | cross-developer peerstext |
Llama-3.1-8BMeta | vs |  Qwen3.8-MaxQwen | cross-developer peerstext |
Llama-3.1-8BMeta | vs |  Kimi-K3Moonshot AI | cross-developer peerstext |
 MiniMax-M3MiniMax | vs | Llama-3.1-8BMeta | cross-developer peerstext |
Llama-3.1-8BMeta | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Llama-3.1-8BMeta | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | Llama-3.1-8BMeta | cross-developer peerstext |
Llama-3.1-8BMeta | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
Llama 3.1 8B vs o3 FAQs
Is Llama 3.1 8B or o3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Llama 3.1 8B and o3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Llama 3.1 8B or o3?+
Only o3 has a directly sourced input price: $1.00 per million tokens. Only o3 has a directly sourced output price: $4.00 per million tokens.
Which has a larger context window, Llama 3.1 8B or o3?+
o3 has the larger sourced context window. Llama 3.1 8B supports 131K and o3 supports 200K.
Which performs better in benchmarks, Llama 3.1 8B or o3?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Llama 3.1 8B or o3 be self-hosted?+
Llama 3.1 8B is the only model in this pair currently marked as self-hostable. Llama 3.1 8B is open weight; o3 is not marked open weight.
Can Llama 3.1 8B and o3 understand images?+
Llama 3.1 8B is not documented with image input; o3 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Llama 3.1 8B or o3?+
Neither has a larger sourced maximum output. Llama 3.1 8B is — and o3 is 100K.
Do Llama 3.1 8B and o3 support reasoning and tool use?+
Llama 3.1 8B: none of these features are definitively sourced. o3: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Llama 3.1 8B or o3?+
Llama 3.1 8B has 1 sourced provider route; o3 has 2, so o3 has broader tracked availability.
Which offers better value, Llama 3.1 8B or o3?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.