Simple chat with LLMR

knitr::opts_chunk$set(
  collapse = TRUE, comment = "#>",
  eval = identical(tolower(Sys.getenv("LLMR_RUN_VIGNETTES", "false")), "true")
)

A stateful conversation is useful when a later question depends on earlier instructions or replies. chat_session() retains that context across turns and provides access to the resulting conversation history.

The examples use two DeepSeek models and two Groq-hosted models. To run them, set DEEPSEEK_API_KEY, GROQ_API_KEY, and LLMR_RUN_VIGNETTES=true in the R environment.

DeepSeek: deepseek-chat

library(LLMR)

cfg_ds <- llm_config(
  provider = "deepseek",
  model    = "deepseek-chat"
)

chat_ds <- chat_session(cfg_ds, system = "Be concise.")
chat_ds$send("Say a warm hello in one short sentence.")
chat_ds$send("Now say it in Esperanto.")

DeepSeek: deepseek-reasoner

cfg_reason <- llm_config(
  provider = "deepseek",
  model    = "deepseek-reasoner"
)

chat_reason <- chat_session(cfg_reason, system = "Be concise.")
chat_reason$send("Name one interesting fact about honey bees.")

Groq: llama-3.1-8b-instant

cfg_groq1 <- llm_config(
  provider = "groq",
  model    = "llama-3.1-8b-instant"
)

chat_groq1 <- chat_session(cfg_groq1, system = "Be concise.")
chat_groq1$send("Give me a single-sentence fun fact about volcanoes.")

Groq: openai/gpt-oss-20b

cfg_groq2 <- llm_config(
  provider = "groq",
  model    = "openai/gpt-oss-20b"
)

chat_groq2 <- chat_session(cfg_groq2, system = "Be concise.")
chat_groq2$send("Share a short fun fact about octopuses.")

Using the chat history

Chat sessions remember context automatically:

chat_ds$send("What did I ask you to do in my first message?")
# The model can reference the earlier "Say a warm hello" request

Inspect the full conversation

# View all messages
as.data.frame(chat_ds)

# Get summary statistics
summary(chat_ds)

Structured chat in one call (DeepSeek example)

schema <- list(
  type = "object",
  properties = list(
    answer     = list(type = "string"),
    confidence = list(type = "number")
  ),
  required = list("answer", "confidence"),
  additionalProperties = FALSE
)

chat_ds$send_structured(
  "Return an answer and a confidence score (0-1) about: Why is the sky blue?",
  schema
)