Together AI vs Vellum
Compare coding AI Tools
Together AI is a cloud platform that provides API access to multiple AI model families for inference and generation, with per unit billing and account tier limits, letting developers run text, image, audio, and video models through a single service and documentation.
Vellum is an AI agent building platform that combines a prompt playground, evaluation tools, and hosted agent apps so teams can iterate on LLM workflows with debugging and knowledge base support, starting with a free tier and upgrading for more credits.
Feature Tags Comparison
Key Features
- Serverless inference API: Call hosted text and multimodal models with per unit billing so you can scale without managing GPUs
- Model catalog pricing: View published model rates and modality sections so cost estimation can be tied to a chosen model id
- Billing and credits: Start with a minimum credit purchase and track balances and limits so usage stays within budget rules
- Rate limit tiers: Qualification based tiers define request and media limits which helps plan throughput for production loads
- Fine tuning services: Offers documented fine tuning workflows with minimum balance requirements and job monitoring tools
- Dedicated infrastructure: Provides options for dedicated endpoints or clusters when you need isolated capacity and controls
- Free and Pro plans: Pricing starts at $0 with 50 credits and Pro at $25 with 200 builder credits so solo builders can scale testing
- Prompt playground: Compare models side by side and iterate prompts systematically instead of relying on subjective testing
- Evaluations framework: Run repeatable quality tests at scale to detect regressions and track improvements across prompt versions
- Hosted agent apps: Share working agents with teammates through hosted apps for demos
- reviews
- and stakeholder feedback cycles
Use Cases
- Prototype an API product: Integrate a single model endpoint for chat and iterate on prompts while tracking per request cost
- Model benchmarking: Swap model ids and compare latency and output quality under the same workload to select a stable baseline
- Image generation backend: Generate images via API for an app and enforce spend limits with credit based billing controls
- Video generation experiments: Test short video models for marketing clips and measure cost per output before scaling usage
- Fine tune for domain tone: Run a fine tuning job for internal style and evaluate improvements with controlled test sets at scale
- Operational guardrails: Implement rate limit aware retries and budget alerts so production traffic stays within set limits
- Agent prototyping: Build an agent by chatting with AI then refine logic with low code steps and controlled prompt versions
- Prompt iteration: Compare LLM outputs side by side and select prompts that improve accuracy and reduce unwanted variation
- Regression testing: Run evaluations on a saved dataset before release to catch quality drops after model or prompt changes
- RAG apps: Attach a knowledge base and test retrieval behavior with representative questions and strict document scope rules
- Stakeholder demos: Publish hosted agent apps so product and compliance reviewers can test behavior without local setup steps
- Model selection: Evaluate providers and self hosted options with the same tasks to choose the best cost and latency mix for production
Perfect For
ml engineers, backend developers, ai product teams, startup founders building ai apps, researchers running benchmarks, platform engineers managing api throughput, teams evaluating model costs
product managers, ML engineers, software engineers, data scientists, AI platform teams, prompt engineers, QA and reliability teams, startups building LLM features, teams shipping agent workflows
Capabilities
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