No product in the candidate list is a chess reasoning LLM. Stockfish 7 is a chess engine that analyzes positions and finds the best move via UCI, so it covers the chess side but not LLM reasoning. For LLM reasoning, general model hosts such as Replicate 9 (which lists Gemini 3 Pro with advanced reasoning) and OpenAI (chat completions) can run reasoning models, and Langfuse 5 and Traceloop 6 help evaluate or observe the LLM calls.
A question back: Do you want a chess engine, an LLM that reasons about chess in text, or both combined?
- 1
Stockfishstockfishchess.orgwebsite read, tools not yet checked
Free open-source chess engine that analyzes chess positions, evaluates them and finds the best move, communicating via the UCI protocol.
- 2
Replicatereplicate.comverified and signed
Hosts open-source and proprietary models behind a cloud API, including Google's Gemini 3 Pro, described as Google's most advanced reasoning Gemini model.
for agents: google/gemini-3-pro · google/gemini-3.1-pro
- 3
OpenAI APIopenai.comverified and signed
Provides a chat completions endpoint that generates model responses to chat messages, which can drive a reasoning model.
official:API · OpenAI APISDK · openailibrary · OpenAIskill · babysit-prSDK · openai+163 community tools built for it
for agents: custom_api_call · listEngines · createChatCompletion
- 4
Langfuselangfuse.comverified and signed
Open-source platform for tracing, evaluating and improving LLM and agent behavior, useful for testing a chess-reasoning model's outputs.
+30 community tools built for it
for agents: llm-as-a-judge · langfuse · llm
Sources
- 5Langfuse: Open Source Agent Evals & Observabilitylangfuse.com · read 2026-10-29
- 6Traceloop - LLM Reliability Platformtraceloop.com · read 2026-10-30
- 7Stockfish - Strong open-source chess enginestockfishchess.org · read 2026-10-29
- 9Replicate - Run AI with an APIreplicate.com · read 2026-10-29
Left out: AnotherAI, because each one's own page says it is retired or discontinued.
For agents: the 10 actions behind this answer
arize-ai-provider-integration · arize-ai-provider-integration verified and signed
Creates, reads, updates, and deletes Arize AI integrations that store LLM provider credentials used by evaluators and other Arize features. Supports any LLM provider (e.g. OpenAI, Anthropic, Azure OpenAI, AWS Bedrock, Vertex AI, Gemini, NVIDIA NIM). Use when the user mentions AI integration, LLM pro
custom_api_call · OpenAI (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
custom_api_call · Notion (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
ai-search-instance-chat-completion · Cloudflare API verified and signed
Chat Completions
llm-as-a-judge · langfuse verified and signed
list_llm_tools_tool · opentelemetry-mcp-server found in code, not yet checked
List all LLM tools being used by identifying traceloop.span.kind == tool.
· Stockfishchess website read, tools not yet checked
Strong open-source chess engine
LLM Inference · x402engine verified and signed
Access 87 LLM routes including Claude Haiku/Sonnet/Opus 5.5, GPT-6.1 Sol, GPT-6 Luna, Mistral Large 4, Grok 4.7, Qwen3.8 Omni Flash and MiMo-V2.6 Flash/Pro. Supports model-specific multimodal input, client function tools, reasoning, structured output and live SSE. Request-specific prepaid quotes; se
google/gemini-3-pro · google/gemini-3-pro verified and signed
Google's most advanced reasoning Gemini model
deepseek-ai/deepseek-r1 · deepseek-ai/deepseek-r1 verified and signed
A reasoning model trained with reinforcement learning, on par with OpenAI o1
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.