Shanghai AI Lab / internlm/agents-a1-free
Agents-A1 - access through LLMTR
Agents-A1 is a 35-billion-parameter (3 billion active) mixture-of-experts (MoE) agent model from Shanghai AI Lab. It is trained for long-horizon web search, software engineering, scientific research, instruction following and tool calling; it splits work into sub-steps and changes its plan as intermediate results come in. Its weights are open under Apache 2.0. Its context window is 262,144 tokens and it accepts text and images (URL or base64). Tool calling is supported; use auto or a named function for tool_choice. The model reasons before answering by default and the reasoning text arrives in reasoning_content; to turn reasoning off, send "reasoning": false or add :fast to the model id. Reasoning tokens count toward max_tokens, so a short max_tokens can cut the answer off before reasoning ends. It is free until 31 October 2026, 23:59 (TRT), with 500,000 tokens per person per day (input and output together).
Technical specifications
| Canonical ID | internlm/agents-a1-free |
|---|---|
| Provider | Shanghai AI Lab |
| Context window | 262,144 tokens |
| Operations | CHAT_COMPLETIONS |
| Modalities | text, image |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| CHAT_COMPLETIONS | INPUT_TEXT | PER_1M_TOKENS | Not available |
| CHAT_COMPLETIONS | OUTPUT_TEXT | PER_1M_TOKENS | Not available |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"internlm/agents-a1-free","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- Shanghai AI Lab models: Intern-S2 to Sage-A1.5 compared - Shanghai AI Lab's five models are called on LLMTR with the same API key through /v1/chat/completions and are free until 31 October 2026, 23:59 (TRT). Intern-S2 is for scientific questions with images, Atria-Dawn for long text-based agent work, Atria-Dawn Preview for trying the open release, Agents-A1 for tool agents that read images, and Sage-A1.5 for flows with subagents. From 1 November 2026 all five return 410.
- Atria-Dawn vs Atria-Dawn Preview: stable release or open preview - Both rows are called on LLMTR with the same API key through /v1/chat/completions; they offer a 524,288-token context, text-only input, json_schema and tool calling, and they are free until 31 October 2026, 23:59 (TRT). Atria-Dawn is the stable release; Atria-Dawn Preview is the preview whose weights are open under the MIT license.
- Agents-A1 vs Sage-A1.5: which agent model for which job - Both models are called on LLMTR through /v1/chat/completions with the same API key and are free until 31 October 2026, 23:59 (TRT). Agents-A1 is a general agent model; Sage-A1.5 is built on Agents-A1 and Qwen3.6, and its model card describes subagent orchestration through a spawn_subagent tool you define. From 1 November 2026 both return 410.
- Building a tool-calling agent loop with Agents-A1 - Agents-A1 runs a multi-turn tool loop on LLMTR through /v1/chat/completions and is free until 31 October 2026, 23:59 (TRT). Define the tools in tools, send auto as tool_choice, run every returned tool call and send the result back in a role: "tool" message, and cap the number of steps. Sage-A1.5 runs the same loop.
- Reasoning and the daily token allowance on Shanghai AI Lab models - All five rows reason before answering by default, and reasoning tokens count toward both max_tokens and the daily token allowance. To turn reasoning off, send "reasoning": false or add :fast to the model id; reasoning_effort returns 400. The rows are free until 31 October 2026, 23:59 (TRT).
- Long-document extraction with Atria-Dawn and JSON Schema - Atria-Dawn can read a long document in one request and return fields that follow a strict JSON Schema, and it is free until 31 October 2026, 23:59 (TRT). Input, output and reasoning share the same context window and the same daily allowance; turning reasoning off for extraction saves tokens.
- Agents-A1, Sage-A1.5 and Qwen3.6 35B-A3B compared - All three models are called on LLMTR through /v1/chat/completions with the same API key, and all three are MoE models with 35 billion total and 3 billion active parameters. Agents-A1 and Sage-A1.5 are free until 31 October 2026, 23:59 (TRT) and return 410 from 1 November 2026. Qwen3.6 35B-A3B is paid: $0.07 input and $0.70 output per 1M tokens.
- Shanghai AI Lab models after 1 November 2026: migration guide - The five Shanghai AI Lab models are free until 31 October 2026, 23:59 (TRT); from 1 November 2026, 00:00, they return 410 model_retired and are not redirected. Scientific questions with images and image-reading agents move to Nemotron 3.5 Super VL or Qwen3.6 35B-A3B; long text-based agent work moves to Nemotron 3 Ultra, Agnes 2.5 Flash, DeepSeek V4.1 Flash or MiniMax M3.1 Flash.
Related models
- Intern-S2 internlm/intern-s2-free
- Atria-Dawn internlm/atria-dawn-free
- Atria-Dawn Preview internlm/atria-dawn-preview-free
- Sage-A1.5 internlm/sage-a1.5-free
- Gemma 4 llmtr/gemma-4
- Qwen 3.6 35B-A3B llmtr/qwen3-6-35b
- Qwen 3.8 27B llmtr/qwen3-8-27b
- Trendyol Asure 12B llmtr/trendyol-asure-12b