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General Reasoning

Hosts RL environments as API endpoints through OpenReward

Platform or hubCoding and SWETool useReasoningDomain experts

General Reasoning runs OpenReward, which serves 430+ RL environments as API endpoints on its infrastructure or yours, and publishes the Open Reward Standard, an open HTTP protocol for agent-environment interaction. It also released the KellyBench betting benchmark and the Apache-2.0 Firehorse sampling library. CEO Ross Taylor previously led reasoning work on Llama 2 and 3 at Meta AI.

Best for: Researchers who want hosted environments behind a standard API with no infrastructure setup

$10.9M (SEC Form D, 2025)

  • – Bespoke builds
  • ✓ Platform or hub
  • ✓ Open source
  • – Publishes prices
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Facts checked November 9, 2026 against the sources listed below. General Reasoning does not pay to appear here.

1 Legal nameGeneral Reasoning, Inc.
2 HeadquartersLondon, UK
3 Founded2025
4 TeamAbout 10
5 DeliveryPlatform or hub, Open source
6 ExclusivityNot disclosed
7 Customers and partnersShows Meta, Google DeepMind, Qwen, Nebius and Sarvam logos under "Built for frontier teams"; it does not say they are paying customers.
8 Published pricesNot disclosed

Where we recommend them

Worth knowing before you sign

  • Now trains its own models (Avalon-M1, Oct 2026), which raises a neutrality question for a shared hub
  • OpenReward pricing is not published (only its BackSearch API has prices)
  • Small team (about 10) for a hosting platform
  • KellyBench figures differ between the paper and the later leaderboard

Go to General Reasoning's site

Sources

  1. OpenReward
  2. General Reasoning news
  3. SEC Form D filing
  4. rl-list profile
  5. OpenReward launch post
  6. KellyBench paper (arXiv)
  7. pavlovslist directory

Work at General Reasoning? Send corrections with a source to editors@toprlenvironments.com. We fix verified errors within five business days.

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