Grok 3 Mini vs Llama 3.1 70B Instruct
Grok 3 Mini (2025) and Llama 3.1 70B Instruct (2024) are compact production models from xAI and AI at Meta. Grok 3 Mini ships a 131k-token context window, while Llama 3.1 70B Instruct ships a 128k-token context window. On pricing, Grok 3 Mini costs $0.25/1M input tokens versus $0.40/1M 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.
Grok 3 Mini is ~60% cheaper at $0.25/1M; pay for Llama 3.1 70B Instruct only for provider fit.
Decision scorecard
Local evidence first| Signal | Grok 3 Mini | Llama 3.1 70B Instruct |
|---|---|---|
| Best for | multimodal apps and provider-routed production | provider-routed production |
| Decision fit | RAG, Long context, and Vision | Coding, RAG, and Long context |
| Context window | 131k | 128k |
| Cheapest output | $1.27/1M tokens | $0.40/1M tokens |
| Provider routes | 2 tracked | 13 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 3.1 70B Instruct has the lower cheapest tracked output price at $0.40/1M tokens.
- Llama 3.1 70B Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags Llama 3.1 70B Instruct for Coding, RAG, and Long context.
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 3.1 70B Instruct
$420
Cheapest tracked route/tier: Hyperbolic AI Inference
Estimated monthly gap: $97.50. 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 3.1 70B Instruct is $0.87/1M 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 $0.87/1M 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 | 2024-07-23 |
| Context window | 131k | 128k |
| Parameters | — | 70B |
| 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 | 2023-12 |
Pricing and availability
| Pricing attribute | Grok 3 Mini | Llama 3.1 70B Instruct |
|---|---|---|
| Input price | $0.25/1M tokens | $0.40/1M tokens |
| Output price | $1.27/1M tokens | $0.40/1M tokens |
| Providers |
Capabilities
| Capability | Grok 3 Mini | Llama 3.1 70B 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 3.1 70B Instruct lists $0.40/1M input and $0.40/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Llama 3.1 70B Instruct lower by about $0.16 per million blended tokens. Availability is 2 providers versus 13, so concentration risk also matters.
Choose Grok 3 Mini when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose Llama 3.1 70B Instruct when provider fit 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 3.1 70B Instruct?
Grok 3 Mini supports 131k tokens, while Llama 3.1 70B Instruct supports 128k 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 3.1 70B Instruct?
Llama 3.1 70B Instruct is cheaper on tracked token pricing. Grok 3 Mini costs $0.25/1M input and $1.27/1M output tokens. Llama 3.1 70B Instruct costs $0.40/1M input and $0.40/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok 3 Mini or Llama 3.1 70B Instruct open source?
Grok 3 Mini is listed under Proprietary. Llama 3.1 70B 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 3.1 70B 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 3.1 70B 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 3.1 70B Instruct?
Grok 3 Mini is available on OpenRouter and Microsoft Foundry. Llama 3.1 70B Instruct is available on Cloudflare Workers AI, OctoAI API (Deprecated), Together AI, Fireworks AI, and NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.