Modernized LLMs inside settings

Author: jamesbraza

README.md

@@ -895,9 +895,9 @@ will return much faster than the first query and we'll be certain the authors ma
 
 | Setting                                      | Default                                | Description                                                                                                                   |
 | -------------------------------------------- | -------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
-| `llm`                                        | `"gpt-4o-2024-11-20"`                  | LLM for general use including metadata inference (see Docs.aadd) and answer generation (see Docs.aquery and gen_answer tool). |
+| `llm`                                        | `"claude-sonnet-4-5-20250929"`         | LLM for general use including metadata inference (see Docs.aadd) and answer generation (see Docs.aquery and gen_answer tool). |
 | `llm_config`                                 | `None`                                 | Optional configuration for `llm`.                                                                                             |
-| `summary_llm`                                | `"gpt-4o-2024-11-20"`                  | LLM for creating contextual summaries (see Docs.aget_evidence and gather_evidence tool).                                      |
+| `summary_llm`                                | `"claude-sonnet-4-5-20250929"`         | LLM for creating contextual summaries (see Docs.aget_evidence and gather_evidence tool).                                      |
 | `summary_llm_config`                         | `None`                                 | Optional configuration for `summary_llm`.                                                                                     |
 | `embedding`                                  | `"text-embedding-3-small"`             | Embedding model for embedding text chunks when adding papers.                                                                 |
 | `embedding_config`                           | `None`                                 | Optional configuration for `embedding`.                                                                                       |
@@ -944,7 +944,7 @@ will return much faster than the first query and we'll be certain the authors ma
 | `prompt.summary_json_system`                 | `summary_json_system_prompt`           | System prompt for JSON summaries.                                                                                             |
 | `prompt.context_outer`                       | `CONTEXT_OUTER_PROMPT`                 | Prompt for how to format all contexts in generate answer.                                                                     |
 | `prompt.context_inner`                       | `CONTEXT_INNER_PROMPT`                 | Prompt for how to format a single context in generate answer. Must contain 'name' and 'text' variables.                       |
-| `agent.agent_llm`                            | `"gpt-4o-2024-11-20"`                  | LLM inside the agent making tool selections.                                                                                  |
+| `agent.agent_llm`                            | `"claude-sonnet-4-5-20250929"`         | LLM inside the agent making tool selections.                                                                                  |
 | `agent.agent_llm_config`                     | `None`                                 | Optional configuration for `agent_llm`.                                                                                       |
 | `agent.agent_type`                           | `"ToolSelector"`                       | Type of agent to use.                                                                                                         |
 | `agent.agent_config`                         | `None`                                 | Optional kwarg for AGENT constructor.                                                                                         |

src/paperqa/settings.py

@@ -11,12 +11,7 @@
 
 import anyio
 from aviary.core import Tool, ToolSelector
-from lmi import (
-    CommonLLMNames,
-    EmbeddingModel,
-    LiteLLMModel,
-    embedding_model_factory,
-)
+from lmi import EmbeddingModel, LiteLLMModel, embedding_model_factory
 from pydantic import (
     BaseModel,
     ConfigDict,
@@ -525,7 +520,7 @@ class AgentSettings(BaseModel):
     model_config = ConfigDict(extra="forbid")
 
     agent_llm: str = Field(
-        default=CommonLLMNames.GPT_4O.value,
+        default="claude-sonnet-4-5-20250929",
         description="LLM inside the agent making tool selections.",
     )
 
@@ -693,7 +688,7 @@ class Settings(BaseSettings):
     model_config = SettingsConfigDict(extra="ignore")
 
     llm: str = Field(
-        default=CommonLLMNames.GPT_4O.value,
+        default="claude-sonnet-4-5-20250929",
         description=(
             "LLM for general use including metadata inference (see Docs.aadd)"
             " and answer generation (see Docs.aquery and gen_answer tool)."
@@ -717,7 +712,7 @@ class Settings(BaseSettings):
         ),
     )
     summary_llm: str = Field(
-        default=CommonLLMNames.GPT_4O.value,
+        default="claude-sonnet-4-5-20250929",
         description=(
             "LLM for creating contextual summaries"
             " (see Docs.aget_evidence and gather_evidence tool)."