The request names OpenAI's GPT-5 Pro model, so OpenAI itself comes first: its source shows an official API, SDK and CLI, and it lists the GPT-5 family through its API. Replicate 2 hosts openai/gpt-5-pro as a runnable model with a cloud API, making it the closest alternative for calling the same model. LiteLLM 5 and RelayGPU 10 offer OpenAI-compatible gateways that route to GPT-5 models.
- 1
OpenAI APIopenai.comverified and signed
Official OpenAI API, SDK and CLI from which GPT-5 Pro can be called directly 1.
official:MCP server · mcp-extensionsAPI · OpenAI APISDK · openailibrary · OpenAICLI · openai-whisper+177 community tools built for it
for agents: custom_api_call · listEngines · retrieveFineTune
- 2
Replicatereplicate.comverified and signed
Runs the openai/gpt-5-pro model through a cloud API with a single run call 2.
+14 community tools built for it
for agents: openai/gpt-5-pro · openai/gpt-5-structured · openai/gpt-5-mini
- 3
- 4
RelayGPUrelaygpu.comwebsite read, tools not yet checked
OpenAI-compatible API that gives access to GPT-5 by changing only the base_url 10.
official:MCP server · Relay
Sources
- 1babysit-pr — openai/codexskills.sh · read 2026-10-29
- 2Replicate - Run AI with an APIreplicate.com · read 2026-10-29
- 5LiteLLM — Open-Source AI Gateway & LLM Proxylitellm.ai · read 2026-10-29
- 10Frontier AI Models, One API, Up to 55% Cheaper | RelayGPUrelaygpu.com · read 2026-10-29
For agents: the 10 actions behind this answer
custom_api_call · OpenAI (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
openai/gpt-5-pro · openai/gpt-5-pro verified and signed
The smartest, fastest, most useful model yet, with built-in thinking that puts expert-level intelligence in everyone’s hands
typespec-create-api-plugin · typespec-create-api-plugin verified and signed
Generate a TypeSpec API plugin with REST operations, authentication, and Adaptive Cards for Microsoft 365 Copilot
API · Microsoft Power BI API verified and signed
curl · shin-watcher-oss found in code, not yet checked
Make an HTTP request to the local litellm proxy (localhost only).
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
get_model_prices · //beforeyouship — LLM cost modeling from your editor verified and signed
Current per-1M-token pricing for all models in the beforeyouship catalog (input, output, cached input, batch), with context windows and pricing-staleness metadata.
muapi_keys_list · Muapi verified and signed
List all API keys on the authenticated muapi.ai account.
· NormaHub website read, tools not yet checked
29 AI-моделей через один API: GPT 6 Sol, GPT 6.1 Sol, Claude Opus 5, Claude Sonnet 5.5 и другие. Один ключ, оплата рублями, без VPN. От $0.0024 за запрос.
· RelayGPU website read, tools not yet checked
Access GPT-5, Claude, DeepSeek and frontier AI models through one OpenAI-compatible API. Change base_url, save up to 55%. No code changes.
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.