Grok 3 Mini vs Llama 3 8B Instruct
Grok 3 Mini (2025) and Llama 3 8B Instruct (2024) are compact production models from xAI and AI at Meta. Grok 3 Mini ships a 131k-token context window, while Llama 3 8B Instruct ships a 8k-token context window. On pricing, Llama 3 8B Instruct costs $0.03/1M input tokens versus $0.25/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Llama 3 8B Instruct is ~733% cheaper at $0.03/1M; pay for Grok 3 Mini only for long-context analysis.
Decision scorecard
Local evidence first| Signal | Grok 3 Mini | Llama 3 8B Instruct |
|---|---|---|
| Best for | multimodal apps and provider-routed production | provider-routed production |
| Decision fit | RAG, Long context, and Vision | Coding, Classification, and JSON / Tool use |
| Context window | 131k | 8k |
| Cheapest output | $1.27/1M tokens | $0.04/1M tokens |
| Provider routes | 2 tracked | 17 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Grok 3 Mini has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Grok 3 Mini uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Grok 3 Mini for RAG, Long context, and Vision.
- Llama 3 8B Instruct has the lower cheapest tracked output price at $0.04/1M tokens.
- Llama 3 8B Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags Llama 3 8B Instruct for Coding, Classification, and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Grok 3 Mini
$518
Cheapest tracked route/tier: Microsoft Foundry
Llama 3 8B Instruct
$34.00
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $484. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Microsoft Foundry and OpenRouter; start route-level A/B tests there.
- Llama 3 8B Instruct is $1.23/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Provider overlap exists on OpenRouter and Microsoft Foundry; start route-level A/B tests there.
- Grok 3 Mini is $1.23/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Grok 3 Mini adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-02-17 | 2024-04-18 |
| Context window | 131k | 8k |
| Parameters | — | 8B |
| Architecture | - | decoder only |
| License | Proprietary | Llama 3 Community |
| Openness | Proprietary | Open weights |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | 2024-11 | 2023-03 |
Pricing and availability
| Pricing attribute | Grok 3 Mini | Llama 3 8B Instruct |
|---|---|---|
| Input price | $0.25/1M tokens | $0.03/1M tokens |
| Output price | $1.27/1M tokens | $0.04/1M tokens |
| Providers |
Capabilities
| Capability | Grok 3 Mini | Llama 3 8B Instruct |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Grok 3 Mini and multimodal input: Grok 3 Mini. Both models share structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Grok 3 Mini lists $0.25/1M input and $1.27/1M output tokens on the cheapest tracked provider, while Llama 3 8B Instruct lists $0.03/1M input and $0.04/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Llama 3 8B Instruct lower by about $0.52 per million blended tokens. Availability is 2 providers versus 17, so concentration risk also matters.
Choose Grok 3 Mini when long-context analysis and larger context windows are central to the workload. Choose Llama 3 8B Instruct when provider fit, lower input-token cost, and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Grok 3 Mini or Llama 3 8B Instruct?
Grok 3 Mini supports 131k tokens, while Llama 3 8B Instruct supports 8k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Grok 3 Mini or Llama 3 8B Instruct?
Llama 3 8B Instruct is cheaper on tracked token pricing. Grok 3 Mini costs $0.25/1M input and $1.27/1M output tokens. Llama 3 8B Instruct costs $0.03/1M input and $0.04/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok 3 Mini or Llama 3 8B Instruct open source?
Grok 3 Mini is listed under Proprietary. Llama 3 8B Instruct is listed under Llama 3 Community. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Grok 3 Mini or Llama 3 8B Instruct?
Grok 3 Mini has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Grok 3 Mini or Llama 3 8B Instruct?
Grok 3 Mini has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Grok 3 Mini and Llama 3 8B Instruct?
Grok 3 Mini is available on OpenRouter and Microsoft Foundry. Llama 3 8B Instruct is available on AWS Bedrock, DeepInfra, OctoAI API (Deprecated), Fireworks AI, and Alibaba Cloud PAI-EAS. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.