Luc: Regroup directory by use; descriptions rewritten in house style

2026-09-08T05:59:23Z

Regroup directory by use; descriptions rewritten in house style

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== Free tier: AI tools and services ==
Free tiers for calling models, and for the less visible work around them: evaluating output, tracing what a model actually did, and running notebooks. The evaluation and observability tools are the larger share, which reflects where the practical difficulty sits.

Part of the [[Free Tier Services Directory]].

=== Running and calling models ===
* [https://gonkabroker.com/ Gonka Broker] — OpenAI-compatible API serving open-source models over a decentralised GPU network.
* [https://lumenfall.ai/ Lumenfall.ai] — Unified API for several image generation models, using the OpenAI request format.
* [https://mediaworkbench.ai Mediaworkbench.ai] — Access to Azure OpenAI, DeepSeek and Gemini models. 100,000 words free.
* [https://openrouter.ai/models?q=free OpenRouter] — Single API in front of many models, including free access to DeepSeek R1 and V3, Llama and Moonshot.
* [https://pollinations.ai/ Pollinations.AI] — Image generation with a free API, no signup and no key required.
* [https://portkey.ai/ Portkey] — Gateway and control panel for generative AI applications, combining routing across providers with logging. 10,000 requests a month.
* [https://huggingface.co huggingface.co] — Hosts and serves models for PyTorch, TensorFlow and JAX, and holds the largest public collection of open models and datasets. Free up to 30,000 input characters.

=== Evaluating and observing models ===
* [https://arize.com Arize AX] — Platform for evaluating and observing AI applications and agents. Free tier includes 25,000 spans a month.
* [https://www.braintrustdata.com/ Braintrust] — Evaluation, prompt playground and dataset management for generative AI. 1,000 private evaluation rows a week.
* [https://www.comet.com/site/products/opik/ Comet Opik] — Open-source platform for evaluating and shipping LLM applications across development and production.
* [https://futureagi.com Future AGI] — Open-source platform for evaluating, tracing and improving LLM and agent applications.
* [https://keywordsai.co Keywords AI] — Monitoring across 200-plus models behind one API format. 10,000 requests free.
* [https://langfuse.com/ Langfuse] — Open-source LLM engineering platform for debugging, analysing and iterating on prompts and traces.
* [https://langwatch.ai LangWatch] — Platform for measuring and monitoring the reliability of LLM applications.
* [https://latitude.so Latitude] — Open-source (MIT) observability and evaluation for AI applications.
* [https://www.getmaxim.ai Maxim] — Evaluation and observability with agent simulation and a prompt playground.
* [https://telemetry.dev telemetry.dev] — Observability for AI applications built on OpenTelemetry, tracing model calls and tool steps.
* [https://arize.com/ Arize AI] — Machine learning observability for monitoring models in production and diagnosing drift and data quality problems.
* [https://www.comet.com/site/ CometML] — MLOps platform for experiment tracking, a model registry and production monitoring.
* [https://getmaxim.ai/ Maxim AI] — Simulates, evaluates and observes AI agents end to end.
* [https://wandb.ai Weights & Biases] — MLOps platform for experiment tracking, dataset versioning and model management. Free for personal use.

=== Applied AI tools ===
* [https://voice-clone.org/tools/audio-enhancer Audio Enhancer] — Removes noise and echo from audio recordings. Unlimited one-click enhancements, no login, supports MP3, WAV and FLAC.
* [https://askclair.ai/ Clair] — Clinical AI reference suite — literature search, clinical summaries, drug interactions, ICD-10 codes. Free for students.
* [https://ReportGPT.app ReportGPT] — Writing assistant that is free to use if you supply your own model API key.
* [https://transcript.lol/ Transcript LOL] — Transcribes audio and video, then summarises it with a language model.
* [https://zenable.io Zenable] — Checks and corrects output from coding assistants such as Cursor, Windsurf and Copilot against your own standards.
* [https://composio.dev/ Composio] — Integration layer connecting AI agents and LLMs to over 200 external tools.
* [https://tavily.com/ Tavily AI] — Search API built for AI agents and research tasks, returning results ready to feed to a model.
* [https://whatthediff.ai What The Diff] — AI code review that summarises what a pull request actually changes. 25,000 tokens a month.

=== Notebooks and data science environments ===
* [https://colab.research.google.com Colaboratory] — Hosted Python notebooks with free GPU access. The standard free environment for trying out models.
* [https://datalore.jetbrains.com Datalore] — Python notebooks from JetBrains with 10 GB of storage and 120 hours of runtime a month.
* [https://deepnote.com Deepnote] — Data science notebook with real-time collaboration, compatible with Jupyter.
* [https://hex.tech/ Hex] — Collaborative platform for notebooks, data applications and shared analysis.

=== Currency ===
Compiled September 2026. Free tiers change frequently and nothing here has been independently verified — check the provider before relying on any allowance described above. Entries cover services with a standing free tier, not free trials.

=== See also ===
[[Generative AI]], [[Large language model (LLM)|Large language model]], [[Open-weight model]], [[Inference]], [[Benchmark (AI evaluation)|Benchmark]], and the other sections of the [[Free Tier Services Directory]].

[[Category:Free Tier Services]]

Free tier: AI tools and services - Revision history

Luc: Regroup directory by use; descriptions rewritten in house style