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. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 2.5 Flash Live API is ~380% cheaper at $0.50/1M; pay for Llama 3.1 405B Instruct only for provider fit.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Flash Live API | Llama 3.1 405B Instruct |
|---|---|---|
| Best for | multimodal apps and tool-calling agents | provider-routed production |
| Decision fit | RAG, Agents, and Long context | RAG, Long context, and Classification |
| Context window | 128k | 128k |
| Cheapest output | $2/1M tokens | $2.40/1M tokens |
| Provider routes | 1 tracked | 11 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemini 2.5 Flash Live API has the lower cheapest tracked output price at $2/1M tokens.
- Gemini 2.5 Flash Live API uniquely exposes Vision, Multimodal, and Function calling in local model data.
- Local decision data tags Gemini 2.5 Flash Live API for RAG, Agents, and Long context.
- Llama 3.1 405B Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Llama 3.1 405B Instruct uniquely exposes Structured outputs in local model data.
- Local decision data tags Llama 3.1 405B Instruct for RAG, Long context, and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 2.5 Flash Live API
$900
Cheapest tracked route/tier: Google AI Studio
Llama 3.1 405B Instruct
$2,520
Cheapest tracked route/tier: AWS Bedrock
Estimated monthly gap: $1,620. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 2.5 Flash Live API and Llama 3.1 405B Instruct; plan for SDK, billing, or endpoint changes.
- Llama 3.1 405B Instruct is $0.40/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision, Multimodal, and Function calling before moving production traffic.
- Llama 3.1 405B Instruct adds Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Llama 3.1 405B Instruct and Gemini 2.5 Flash Live API; plan for SDK, billing, or endpoint changes.
- Gemini 2.5 Flash Live API is $0.40/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Structured outputs before moving production traffic.
- Gemini 2.5 Flash Live API adds Vision, Multimodal, and Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-12-01 | 2024-07-23 |
| Context window | 128k | 128k |
| Parameters | — | 405B |
| Architecture | decoder only | decoder only |
| License | Proprietary | Llama 3 Community |
| Openness | Proprietary | Open weights |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | 2025-01 | 2023-12 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Flash Live API | Llama 3.1 405B Instruct |
|---|---|---|
| Input price | $0.50/1M tokens | $2.40/1M tokens |
| Output price | $2/1M tokens | $2.40/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Flash Live API | Llama 3.1 405B Instruct |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | No | 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: 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 $0.50/1M input and $2/1M output tokens on the cheapest tracked provider, while Llama 3.1 405B Instruct lists $2.40/1M input and $2.40/1M 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 $0.50/1M input and $2/1M output tokens. Llama 3.1 405B Instruct costs $2.40/1M input and $2.40/1M 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 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, 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 (Deprecated), 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: 2026-05-19. Data sourced from public model cards and provider documentation.