Together AI API
Together AI provides high-throughput, cost-effective inference for 100+ open-source LLMs including Llama 3.x, Mixtral, Qwen, DeepSeek, and Code Llama. Uses an OpenAI-compatible API (same endpoint format, same client libraries), making it a drop-in alternative for agents using OpenAI SDKs. Supports chat completions, text completions, embeddings, image generation, and fine-tuning. Popular for teams wanting open model access without vendor lock-in.
Best When
You want OpenAI API compatibility but need open-source models (for cost, privacy, or customization), or when you need to fine-tune a model on your own data. The OpenAI-compatible format means zero code changes when switching from OpenAI.
Avoid When
You need the absolute lowest latency (use Groq), guaranteed frontier model performance (use OpenAI/Anthropic directly), or need multimodal vision with open models at production quality.
Use Cases
- • Drop-in replacement for OpenAI API using open-source models at lower cost
- • Running Llama 3.x or Mixtral models for production AI agent backends
- • Fine-tuning open-source LLMs on proprietary data without managing GPU infrastructure
- • Parallel inference across multiple models for ensemble/routing architectures
- • Cost-sensitive agent workloads where OpenAI pricing is prohibitive
- • Evaluating multiple open-source models against each other via unified API
- • Building privacy-sensitive applications where keeping data off proprietary APIs matters
Not For
- • Agents that require GPT-4 or Claude-specific capabilities — open models may underperform on complex reasoning
- • Ultra-low latency requirements under 100ms (use Groq for that)
- • Teams that need enterprise SLA guarantees beyond 99.9% uptime
Alternatives
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Scores are editorial opinions as of 2026-03-01.