Choose agents and models

Choose which agents answer a journey and which model each one runs. Both affect which reports you can compare over time.

Which agents a journey can use

Agent	Type	Research	Agent Task	Reports the sources it read
ChatGPT	AI assistant	Yes	No	Yes
Claude	AI assistant	Yes	No	Yes
Perplexity	AI assistant	Yes	No	Yes
Gemini	AI assistant	Yes	No	Yes
Claude Code	Coding agent	Yes	Yes	Yes
Codex	Coding agent	Yes	Yes	No

• A Research journey can use any of the six, so you can also ask a product question the way a developer would ask it inside a coding agent.
• An Agent Task journey uses coding agents only. See Agent Task journeys.
• A new journey starts with ChatGPT. Switching it to Agent Task selects Claude Code. At least one agent stays selected.

Models and defaults

You select one model per agent. The menu shows each vendor’s own model ID, and the first item is the default.

Agent	Default	Other choices
ChatGPT	gpt-6.1-sol	gpt-6-astra, gpt-6-luna, gpt-5.6-sol, gpt-4o
Claude	claude-sonnet-5-5	claude-opus-5-5, claude-haiku-4-5-20251001, claude-sonnet-5
Gemini	gemini-3.8-flash	gemini-3.1-pro-preview, gemini-3.5-flash-lite, gemini-2.5-flash
Perplexity	sonar	sonar-pro, sonar-reasoning-pro, sonar-deep-research
Claude Code	claude-sonnet-5-5	claude-opus-5-5, claude-haiku-4-5-20251001
Codex	gpt-5.3-codex	gpt-6.1-sol, gpt-5.2

The list changes as vendors release models; the menu in the app is always current. A journey keeps the model it was saved with, even after EkLine changes a default or drops that model from the menu.

Each report records, under Run configuration and environment, the model each vendor said it served. A vendor can serve a newer build under the same name, which is why the app marks this “recorded, not pinned”.

Before you begin

• A journey to edit, or a new one. See Create a research journey.
• Any member of your organization can change a journey.

Steps

1. Open the journey’s Edit tab, or click New journey.

2. Under How we’ll run it, click an agent’s name to add or remove it.

3. To change a selected agent’s model, click the model name on its chip and select one from the Model for menu.

4. Click Save draft, or run the journey.

Settings that differ by agent

Agent	Turns web search off when you clear Let the agent search the web	Applies the At most search limit
ChatGPT, Gemini, Claude Code, Codex	Yes	No
Claude	Yes	Yes, as one budget for the whole run
Perplexity	No, it always searches	No

Agent Task journeys do not show the web search control. Each run records the search settings that were actually applied.

What you cannot choose

EkLine picks the model that grades judged checks, and the models behind Create scenario with AI and the written summaries in reports. You cannot change them. See How results are measured.

How a change affects comparisons

• Each agent has its own trend. Results are never averaged across agents.
• Changing an agent’s model starts a new series for that agent, with a new baseline. Its earlier reports stay on the Reports tab under their own heading, which says “deltas are comparable within this series only”.
• Adding or removing an agent starts or ends that agent’s series and leaves the other agents’ series as they were.
• Changing Number of runs or web search does not start a new series. Reports in one series can therefore differ in those settings. See Track results over time.

Check it worked

• Under How we’ll run it, each selected agent’s chip shows the model it runs.
• After the next run, the report’s Run configuration and environment lists each agent with its model.

Next

• Journey agents and checks: the reference tables.
• Track results over time