Gemini 2.5 Flash Live API vs Llama 3.1 405B Instruct
Gemini 2.5 Flash Live API (2025) and Llama 3.1 405B Instruct (2024) are compact production models from Google DeepMind and AI at Meta. Gemini 2.5 Flash Live API ships a 128K-token context window, while Llama 3.1 405B Instruct ships a 128K-token context window. On pricing, Gemini 2.5 Flash Live API costs $0.5/1M input tokens versus $2.4/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Gemini 2.5 Flash Live API is ~380% cheaper at $0.5/1M; pay for Llama 3.1 405B Instruct only for provider fit.
Specs
| Released | 2025-12-01 | 2024-07-23 |
| Context window | 128K | 128K |
| Parameters | — | 405B |
| Architecture | decoder only | decoder only |
| License | Proprietary | Open Source |
| Knowledge cutoff | - | - |
Pricing and availability
| Gemini 2.5 Flash Live API | Llama 3.1 405B Instruct | |
|---|---|---|
| Input price | $0.5/1M tokens | $2.4/1M tokens |
| Output price | $2/1M tokens | $2.4/1M tokens |
| Providers |
Capabilities
| Gemini 2.5 Flash Live API | Llama 3.1 405B Instruct | |
|---|---|---|
| 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 vision: Gemini 2.5 Flash Live API, multimodal input: Gemini 2.5 Flash Live API, function calling: Gemini 2.5 Flash Live API, tool use: Gemini 2.5 Flash Live API, and structured outputs: Llama 3.1 405B Instruct. 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.
For cost, Gemini 2.5 Flash Live API lists $0.5/1M input and $2/1M output tokens, while Llama 3.1 405B Instruct lists $2.4/1M input and $2.4/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 2.5 Flash Live API lower by about $1.45 per million blended tokens. Availability is 1 providers versus 11, so concentration risk also matters.
Choose Gemini 2.5 Flash Live API when vision-heavy evaluation and lower input-token cost are central to the workload. Choose Llama 3.1 405B 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.
FAQ
Which has a larger context window, Gemini 2.5 Flash Live API or Llama 3.1 405B Instruct?
Gemini 2.5 Flash Live API supports 128K tokens, while Llama 3.1 405B 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, Gemini 2.5 Flash Live API or Llama 3.1 405B Instruct?
Gemini 2.5 Flash Live API is cheaper on tracked token pricing. Gemini 2.5 Flash Live API costs $0.5/1M input and $2/1M output tokens. Llama 3.1 405B Instruct costs $2.4/1M input and $2.4/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 2.5 Flash Live API or Llama 3.1 405B Instruct open source?
Gemini 2.5 Flash Live API is listed under Proprietary. Llama 3.1 405B Instruct 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 vision, Gemini 2.5 Flash Live API or Llama 3.1 405B Instruct?
Gemini 2.5 Flash Live API 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, Gemini 2.5 Flash Live API or Llama 3.1 405B Instruct?
Gemini 2.5 Flash Live API 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 Gemini 2.5 Flash Live API and Llama 3.1 405B Instruct?
Gemini 2.5 Flash Live API is available on Google AI Studio. Llama 3.1 405B Instruct is available on OctoAI API, Together AI, Fireworks AI, IBM watsonx, and Scale AI GenAI Platform. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.