AllenAI: Olmo 3.1 32B Think✓ Catalog verified
Olmo 3.1 32B Think is a large-scale, 32-billion-parameter model designed for deep reasoning, complex multi-step logic, and advanced instruction following. Building on the Olmo 3 series, version 3.1 delivers refined reasoning behavior and stronger performance across demanding evaluations and nuanced conversational tasks. Developed by Ai2 under the Apache 2.0 license, Olmo 3.1 32B Think continues the Olmo initiative’s commitment to openness, providing full transparency across model weights, code, and training methodology.
Overview
Olmo 3.1 32B Think is a large-scale, 32-billion-parameter model designed for deep reasoning, complex multi-step logic, and advanced instruction following. Building on the Olmo 3 series, version 3.1 delivers refined reasoning behavior and stronger performance across demanding evaluations and nuanced conversational tasks. Developed by Ai2 under the Apache 2.0 license, Olmo 3.1 32B Think continues the Olmo initiative’s commitment to openness, providing full transparency across model weights, code, and training methodology.
Access: available through the official Allenai API. Context window: 66K.
Specifications
| API identifier | allenai/olmo-3.1-32b-think |
| Provider | Allenai |
| Model type | Text LLM |
| Context window | 66K catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Dec 16, 2025 |
| Moderated | No |
| Architecture modality | text->text |
| Scheduled expiry | 2026-04-06 |
API defaults
{
"top_p": 0.95,
"temperature": 0.6,
"frequency_penalty": null
}Pricing
Live pricing components for allenai/olmo-3.1-32b-think as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $1.5e-7 | $0.15 / 1M | Per input token |
| Completion tokens | $5e-7 | $0.50 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.17Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | Not advertised | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call AllenAI: Olmo 3.1 32B Think through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="allenai/olmo-3.1-32b-think",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) | 66K | $0.50 | View → | |
| Google: Nano Banana Pro (Gemini 3 Pro Image Preview) | 66K | $2.00 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does AllenAI: Olmo 3.1 32B Think cost?
$0.15 per 1M input tokens and $0.50 per 1M output tokens on the official Allenai API.
What is the context window of AllenAI: Olmo 3.1 32B Think?
AllenAI: Olmo 3.1 32B Think supports up to 66K tokens of context.
Does AllenAI: Olmo 3.1 32B Think support tool / function calling?
AllenAI: Olmo 3.1 32B Think does not advertise first-class tool/function calling. Check vendor docs for the latest capabilities.
How do I access AllenAI: Olmo 3.1 32B Think?
Use the official Allenai API with the model id `allenai/olmo-3.1-32b-think`. See the Quick start section above for code examples.