Grok 4 Heavy vs Together AI - Llama 3 8B Lite
Grok 4 Heavy (2025) and Together AI - Llama 3 8B Lite (2025) are compact production models from xAI and AI at Meta. Grok 4 Heavy ships a 256k-token context window, while Together AI - Llama 3 8B Lite ships a 8K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Grok 4 Heavy fits 31x more tokens; pick it for long-context work and Together AI - Llama 3 8B Lite for tighter calls.
Specs
| Released | 2025-07-09 | 2025-07-15 |
| Context window | 256k | 8K |
| Parameters | — | 8B |
| Architecture | - | decoder only |
| License | Proprietary | Open Source |
| Knowledge cutoff | - | 2024-03 |
Pricing and availability
| Grok 4 Heavy | Together AI - Llama 3 8B Lite | |
|---|---|---|
| Input price | - | $0.1/1M tokens |
| Output price | - | $0.1/1M tokens |
| Providers | - |
Capabilities
| Grok 4 Heavy | Together AI - Llama 3 8B Lite | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: Grok 4 Heavy, function calling: Together AI - Llama 3 8B Lite, tool use: Together AI - Llama 3 8B Lite, and structured outputs: Together AI - Llama 3 8B Lite. Both models share the core language-model surface, 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.
Pricing coverage is uneven: Grok 4 Heavy has no token price sourced yet and Together AI - Llama 3 8B Lite has $0.1/1M input tokens. Provider availability is 0 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Grok 4 Heavy when long-context analysis and larger context windows are central to the workload. Choose Together AI - Llama 3 8B Lite 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.
FAQ
Which has a larger context window, Grok 4 Heavy or Together AI - Llama 3 8B Lite?
Grok 4 Heavy supports 256k tokens, while Together AI - Llama 3 8B Lite supports 8K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Grok 4 Heavy or Together AI - Llama 3 8B Lite open source?
Grok 4 Heavy is listed under Proprietary. Together AI - Llama 3 8B Lite is listed under Open Source. 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 multimodal input, Grok 4 Heavy or Together AI - Llama 3 8B Lite?
Grok 4 Heavy 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.
Which is better for function calling, Grok 4 Heavy or Together AI - Llama 3 8B Lite?
Together AI - Llama 3 8B Lite has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, Grok 4 Heavy or Together AI - Llama 3 8B Lite?
Together AI - Llama 3 8B Lite has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Grok 4 Heavy and Together AI - Llama 3 8B Lite?
Grok 4 Heavy is available on the tracked providers still being sourced. Together AI - Llama 3 8B Lite is available on Together AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.