OpenAI vs Together AI: LLM APIs Comparison (2026)
OpenAI offers a free tier with limited access to features, while Together AI does not offer a permanent free version but has a low starting price. OpenAI provides advanced reasoning and unlimited usage on some features in higher tiers, while Together AI focuses on GPU clusters, serverless inference, fine-tuning, and dedicated inference.
AI Citation Scorecard
How often each is cited by major AI engines when buyers ask llm apis questions. Last 90 days across ChatGPT, Perplexity, Gemini, Claude, and Copilot.
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
- ✓Limited access to GPT-5.5 Instant
- ✓Limited messages and uploads
- ✓Limited faster image generation
- ✓Advanced reasoning with GPT-5.5 Thinking
- ✓Unlimited GPT-5.3 and file uploads
- ✓5x or 20x more usage
- ✓Unlimited memory
- ✓Unlimited subject to abuse guardrails
- ✓On-demand GPU Clusters
- ✓Serverless Inference
- ✓Fine-Tuning
- ✓Dedicated Inference
When to choose OpenAI
OpenAI is suitable for users who need a free tier with basic access to an LLM, or those who require advanced reasoning, unlimited memory, and extensive usage of specific models and file uploads in its higher tiers.
When to choose Together AI
Together AI is suitable for users who require on-demand GPU clusters, serverless inference, fine-tuning capabilities, and dedicated inference, with a focus on affordability and scalability.
Frequently Asked Questions
AI visibility profiles
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