LFM2.5-1.2B-Thinking Intelligence, Performance & Price Analysis
Model summary
Intelligence
Artificial Analysis Intelligence Index
Speed
Output tokens per second
Input Price
USD per 1M tokens
Output Price
USD per 1M tokens
Verbosity
Output tokens from Intelligence Index
Metrics are compared against models of the same class:
- Non-reasoning models → compared only with other non-reasoning models
- Reasoning models → compared across both reasoning and non-reasoning
- Open weights models → compared only with other open weights models of the same size class:
- Tiny: ≤4B parameters
- Small: 4B–40B parameters
- Medium: 40B–150B parameters
- Large: >150B parameters
- Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio:
- <$0.15 per 1M tokens
- $0.15–$1 per 1M tokens
- >$1 per 1M tokens
| Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. |
|---|---|
| Input modality | Supports: text |
| Output modality | Supports: text |
| Context window | 32k ~48 A4 pages of size 12 Arial font |
| Total parameters | 1.2B |
| License | lfm 1.0 |
| Model weights | Hugging Face |
LFM2.5-1.2B-Thinking is below average in intelligence, but well priced when comparing to other open weight models of similar size. The model supports text input, outputs text, and has a 32k tokens context window.
LFM2.5-1.2B-Thinking scores 8 on the Artificial Analysis Intelligence Index, placing it below average among comparable models (averaging 8). When evaluating the Intelligence Index, it generated 31M tokens, which is somewhat verbose in comparison to the average of 16M.
Pricing for LFM2.5-1.2B-Thinking is $0.00 per 1M input tokens (competitively priced, average: $0.00) and $0.00 per 1M output tokens (competitively priced, average: $0.00). In total, it cost $0.00 to evaluate LFM2.5-1.2B-Thinking on the Intelligence Index.
Intelligence
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Evaluations
Openness
Artificial Analysis Openness Index: Results
Intelligence Index Comparisons
Intelligence vs. Price
Intelligence Index Token Use & Cost
Output Tokens Used to Run Artificial Analysis Intelligence Index
Cost to Run Artificial Analysis Intelligence Index
Context Window
Context Window
Pricing
Pricing: Input and Output Prices
Intelligence vs. Price (Log Scale)
Pricing Comparison of LFM2.5-1.2B-Thinking API Providers
Speed
Measured by Output Speed (tokens per second)
Output Speed
Output Speed vs. Price
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 Tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Model Size (Open Weights Models Only)
Model Size: Total and Active Parameters
Frequently Asked Questions
Common questions about LFM2.5-1.2B-Thinking
LFM2.5-1.2B-Thinking was released on January 20, 2026.
LFM2.5-1.2B-Thinking was created by Liquid AI.
LFM2.5-1.2B-Thinking scores 8 on the Artificial Analysis Intelligence Index, placing it below average among other open weight models of similar size (median: 8).
When evaluated on the Intelligence Index, LFM2.5-1.2B-Thinking generated 31M output tokens, which is somewhat higher than average compared to other open weight models of similar size (median: 16M).
Yes, LFM2.5-1.2B-Thinking is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
LFM2.5-1.2B-Thinking supports text input.
LFM2.5-1.2B-Thinking supports text output.
No, LFM2.5-1.2B-Thinking does not support image input. It can only process text.
No, LFM2.5-1.2B-Thinking is not multimodal. It only supports text input.
LFM2.5-1.2B-Thinking has a context window of 32k tokens. This determines how much text and conversation history the model can process in a single request.
Yes, LFM2.5-1.2B-Thinking is open weights. The model weights are publicly available and can be downloaded for self-hosting.
LFM2.5-1.2B-Thinking has 1.17 billion parameters.
LFM2.5-1.2B-Thinking is released under the lfm 1.0 license. This license allows commercial use. View license
LFM2.5-1.2B-Thinking achieves a score of 8 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
LFM2.5-1.2B-Thinking is an open weights model that can be self-hosted. View providers
LFM2.5-1.2B-Thinking is an open weights model that can be downloaded and self-hosted. Compare providers