# Error in the HTTP2 framing layer for sonar-deep-research **URL:** \ **Category:** Bug Reports\ **Created:** [August 7, 2025, 5:45am UTC](https://community.perplexity.ai/t/error-in-the-http2-framing-layer-for-sonar-deep-research/918 "2025-08-07T05:45:02Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![lester](https://avatars.discourse-cdn.com/v4/letter/l/b9e5f3/32.png) [@lester](https://community.perplexity.ai/u/lester)\ **Post date:** [August 7, 2025, 5:45am UTC](https://community.perplexity.ai/t/error-in-the-http2-framing-layer-for-sonar-deep-research/918/1 "2025-08-07T05:45:02Z")
## 🐛 Describe the Bug Following the curl command in [Sonar deep research - Perplexity](https://docs.perplexity.ai/getting-started/models/models/sonar-deep-research) , got this error `curl: (16) Error in the HTTP2 framing layer`. However, when I change model to `sonar-pro`, a valid response is returned. ## ✅ Expected Behavior Returns success response ## ❌ Actual Behavior got error `curl: (16) Error in the HTTP2 framing layer` ## 🔄 Steps to Reproduce 1. Call the API with the request below. ## 📌 API Request & Response (if applicable) `curl --request POST ` `–url ``https://api.perplexity.ai/chat/completions`` ` `–header ‘Authorization: Bearer ’ ` `–header ‘Content-Type: application/json’ ` `–data ‘{` `“model”: “sonar-deep-research”,` `“messages”: [{“role”: “user”, “content”: “Provide an exhaustive analysis of current approaches to achieving net-zero carbon emissions in heavy industry, including technological solutions, policy frameworks, and economic feasibility across different sectors.”}],` `“reasoning_effort”: “low”` `}’ | jq` ```bash % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 337 0 0 100 337 0 5 0:01:07 0:01:00 0:00:07 0 curl: (16) Error in the HTTP2 framing layer ``` ## 🌍 Environment - **API Version:** sonar-deep-research - **SDK (if applicable):** curl 8.7.1 - **Operating System:** MacOS ## 📎 Logs or Screenshots (if applicable) Add any logs or screenshots that can help debug the issue. ## 📝 Additional Context Add any other context about the problem here.