Tasks and inputs
Llama 3.1 405B is listed for Text generation, Text-to-text AI models. It accepts text and produces text. Use the publisher’s input format and preprocessing for your chosen deployment.
SyncDev model directory · Profile updated Oct 7, 2026
Meta's largest open-weights model, competitive with frontier closed models.
The specification score summarizes recorded features and limits. It is not a benchmark result.
Recorded modality support shows what this model can accept and produce. An undocumented modality is shown as unknown rather than assumed to be unsupported.
Accepts
Produces
Llama 3.1 405B is a Meta model retained in SyncDev’s public directory. This record now links to an authoritative source so readers can distinguish documented facts from information that changes over time. The editorial summary does not infer a current price, API route, benchmark result, regional availability, or feature guarantee from a historical model name.
Use the linked first-party documentation to confirm the current interface, supported modalities, context and output limits, safety requirements, service availability, and commercial terms. Those details can change independently of this directory. For a production decision, test representative prompts, tool calls, latency targets, multilingual needs, and reliability requirements with the provider’s current release.
A useful comparison starts with the workload, not a generic winner. Compare the model against alternatives using the same prompts, token budgets, evaluation rubric, deployment region, and cost assumptions. Where this page does not show a verified measurement, treat it as unknown rather than filling the gap with an estimate.
Explore Meta models and the text-to-text ai models collection. Use the comparison tool to inspect a second candidate.
Compare the model on the work you need to complete.
Llama 3.1 405B is listed for Text generation, Text-to-text AI models. It accepts text and produces text. Use the publisher’s input format and preprocessing for your chosen deployment.
Documented limits: 128K context and 4.1K maximum output. The listed route charges $3.50 input and $3.50 output per million tokens. Measure a completed task using the prompts, documents and tools your application will use. Include reasoning and retries in the result.
The listed measurement is 30 t/s output speed and 0.70s time to first token. Compare the same hosting route, prompt length and concurrency before using it to size an application.
The weights are downloadable under Llama 3.1 Community. Check runtime support and size the complete model and working context for your expected concurrency.
Each score below comes from a published result we could trace back to its source. Read them as evidence about the specific task a benchmark measures — a model that leads on one can easily trail on another.
These records share a directory category. Check the source card, output type and deployment requirements before treating a model as a replacement.
Openai via Requesty
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly reduces unnecessary refusals, caveats, and overly cautious phrasing that can interrupt conversational flow.
Openai via Requesty
o3-mini is OpenAI's most recent small reasoning model, providing high intelligence at the same cost and latency targets of o1-mini. o3-mini also supports key developer features, like Structured Outputs, function calling, Batch API, and more. Like other models in the o-series, it is designed to excel at science, math, and coding tasks.
Openai via Requesty
o4-mini is OpenAI's most recent small reasoning model, providing high intelligence at the same cost and latency targets of o1-mini. o3-mini also supports key developer features, like Structured Outputs, function calling, Batch API, and more. Like other models in the o-series, it is designed to excel at science, math, and coding tasks.
Xai via Requesty
A frontier multimodal model optimized specifically for high-performance agentic tool calling.
Xai via Requesty
xAI's latest advancement in cost-efficient reasoning models
Xai via Requesty
A speedy and economical reasoning model that excels at agentic coding