FlexAI

What is FlexAI?

FlexAI is an AI infrastructure platform for running open models through one OpenAI-compatible API key. Its serverless product, Token Factory, covers text generation, code, vision, embeddings, image generation, speech-to-text, text-to-speech, moderation, reranking and video models, billed by the token, image, minute or clip with no subscription. When traffic is steady, teams can move to dedicated endpoints on reserved NVIDIA GPUs that bill per minute and autoscale, or deploy their own fine-tuned models and LoRA adapters on the same account and key. FlexAI also offers managed fine-tuning and pre-training, and an AI Factory option that runs the same stack inside a private cloud, on-premises or air-gapped environment. To switch from OpenAI-style code, you change the base URL and keep your prompts, tools and SDK calls. Serverless pricing is listed per model, with tokens from $0.01/M, and dedicated GPU rates are quoted per GPU-hour. Custom pricing applies to AI Factory and enterprise deployments.

Use cases

• Call open-weight LLMs through one API
• Run dedicated GPU inference endpoints
• Fine-tune open models on managed GPUs
• Deploy custom LoRA adapters
• Transcribe audio with speech-to-text models
• Generate embeddings and rerank results
• Run models in a private cloud

Who it's for

• AI engineers
• Developers
• ML platform teams
• Enterprises

Why use FlexAI

• One API key covers text, vision, image, video and audio models, so switching models means changing a model name.
• Existing OpenAI SDK code can run by changing the base URL.
• Usage-based billing means there is no commitment beyond what you use.
• You can move from serverless to dedicated GPUs on the same account when volume grows.
• A calculator on the site compares serverless and dedicated costs at your token volume.

FlexAI features

• OpenAI-compatible chat completions endpoint
• Per-model serverless pricing across the model catalog
• Streaming, tool calls, structured output and vision inputs
• Dedicated GPU endpoints billed per minute with autoscaling
• Reserved NVIDIA GPUs with NVLink and InfiniBand
• Deploy fine-tuned checkpoints and LoRA adapters
• Managed fine-tuning with SFT, DPO and GRPO
• Pre-training on multi-node clusters
• Region selection and one-click endpoint setup
• AI Factory for VPC, on-premises and air-gapped use

FlexAI integrations

• PyTorch
• TensorFlow
• Grafana
• Prometheus
• TensorBoard
• Weights & Biases
• Kubernetes
• Slurm

How to get started with FlexAI

1. Create an API key for free and try the rate-limited demo in the browser.
2. Set the base URL to the FlexAI endpoint, add your key and choose a model ID.
3. Add a card when you are ready to spend and watch spend, limits and key health.
4. Move steady traffic to dedicated endpoints or deploy your own fine-tuned model on the same key.

FlexAI limitations

• Serverless token prices differ by model, so cost depends on your model choice
• Dedicated GPU rates are on-demand list prices; other package rates need a sales contact
• Fine-tuning and pre-training start at dedicated capacity
• AgentOS is listed as in trial

FlexAI pricing

FlexAI has no free plan. Plans start at $0.01 usage-based, according to the official pricing page on 24 Oct 2026.

FlexAI plans

• Serverless

  From $0.01/M tokens

  pay as you go, per model

  • Token Factory, one OpenAI-compatible key
  • Billed per token, image, minute or clip
  • 2 workspace seats on self-serve
  • Dedicated endpoints on demand

• Dedicated

  $1.80/hr to $6.25/hr

  per GPU, billed per minute

  • A100 $1.80/hr
  • H100 $2.10/hr
  • H200 $3.15/hr
  • B200 $6.25/hr
  • Autoscaling and region selection

• Custom

  Custom

  AI Factory and enterprise

  • VPC, on-premises and air-gapped options
  • SLA 99.9% with geo redundancy
  • Dedicated CSM

Plans as listed on the official pricing page on 24 Oct 2026. Prices can change and may vary by country or exclude tax. Check the official pricing page.

FlexAI alternatives

The main FlexAI alternatives listed on Debuly are Together AI, Fireworks AI, Replicate, Baseten, Groq and OpenRouter. The table compares pricing and platforms; order is A–Z.

1. 

   Baseten

   Inference platform for deploying open-source, custom and fine-tuned AI models, with per-token Model APIs and dedicated GPUs.

   Developer platforms
   PaidVisit Baseten (official site)
2. 

   Fireworks AI

   Inference and training platform for open models: pay-per-token serverless APIs, GPU deployments, fine-tuning and reserved capacity.

   Developer platformsCodingAutomation and agents
   PaidVisit Fireworks AI (official site)
3. 

   Groq

   GroqCloud inference API that serves open models such as GPT-OSS and Whisper on Groq's LPU hardware, billed per token.

   Developer platformsAudio and voiceCoding
   FreemiumVisit Groq (official site)
4. 

   OpenRouter

   Unified OpenAI-compatible API for 500+ AI models with provider fallbacks, pay-as-you-go credits and a free tier

   Developer platformsChat assistantsAutomation and agents
   FreemiumVisit OpenRouter (official site)
5. 

   Replicate

   Cloud API for running, fine-tuning and deploying open-source and proprietary AI models, billed by compute time or by output.

   Developer platformsImage generationVideo
   PaidVisit Replicate (official site)
6. 

   Together AI

   AI cloud for running open-source models through serverless and batch inference, dedicated endpoints, GPU clusters and fine-tuning.

   Developer platformsCoding
   PaidVisit Together AI (official site)

FlexAI FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: from flex.ai · fetched 24 Oct 2026 · Vendor trademark, used only to identify the product; removed on request
• Cover: none collected yet, so a generated tile is shown.

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