Perplexity: April 2026 changelog adds Claude Opus 4.7, GPT-5.5 and Grok 4.20 Reasoning to Agent API

Perplexity’s April 2026 changelog (published 2026-05-13) summarizes a set of updates that move the Agent API platform from a “Perplexity-only” approach toward multi-model orchestration. The most significant changes include new third-party models, an n8n integration, an AWS Marketplace listing, and a revised security model for API keys.

Which new models have joined the Agent API?

The Agent API now supports Claude Opus 4.7, GPT-5.5 and Grok 4.20 Reasoning as third-party models with tool-calling and structured output capabilities. Users can combine Perplexity Search and Sonar corpora with Anthropic, OpenAI and xAI reasoning inside a single Agent API call. The new /v1/models endpoint returns all available Agent API models in OpenAI-compatible format without authentication, making dynamic model selection easier in integrations.

What does the API key security upgrade change?

The security change is non-trivial: the full token value is now returned only at the moment of creation and is not retrievable afterward. This reduces credential exposure and follows the industry standard already adopted by Anthropic, OpenAI and Google. Existing keys remain active, but users without a secure vault must rotate their keys.

Which integrations and marketplace changes are included?

n8n has released a native Perplexity node with full coverage of Chat Completions, Agent, Search and Embeddings endpoints, plus dynamic model loading from the API. OpenClaw, an open-source terminal AI agent, now supports the Perplexity Search API as a native web search provider — structured search results flow directly into terminal workflows.

The Perplexity API platform is also available as SaaS on AWS Marketplace, enabling enterprise buyers to purchase API credits through their AWS account with consolidated billing. The change positions Perplexity as a platform for enterprise AI deployment, not merely a consumer search alternative.