AI Models with Tool Calling

Tool calling is the difference between a chatbot and an agent. Every model here can emit structured calls to your functions, but reliability varies widely, especially on nested or parallel calls, and the spec table will not tell you that. Treat this list as the shortlist of candidates, then test the ones that fit your budget against your actual tool schema.

Showing top 25 of 516 matching models · last synced 18 hours ago

Top pick right now: Gemma 4 31B IT from Google. It offers tool calling at the lowest output price in this set (N/A/Mtok).

# Model Provider Input $/Mtok Output $/Mtok Context Capabilities
1
Gemma 4 31B IT
Google N/A N/A 262,144 vision, tools, reasoning, structured output, open
2
Gemma 4 26B A4B IT
Google N/A N/A 262,144 vision, tools, reasoning, structured output, open
3
Auto Router
OpenRouter N/A N/A 2,000,000 vision, tools, reasoning, structured output
4
Gemma 4 E4B IT
Google N/A N/A 131,072 vision, tools, reasoning, structured output, open
5
Gemma 4 E2B IT
Google N/A N/A 131,072 vision, tools, reasoning, structured output, open
6
LFM2.5-1.2B-Thinking (free)
OpenRouter Free Free 32,768 tools, reasoning, structured output, open
7
Elephant (free)
OpenRouter Free Free 262,144 tools, reasoning, structured output
8
Free Models Router
OpenRouter Free Free 200,000 vision, tools, reasoning, structured output
9
Trinity Large Preview
OpenRouter Free Free 131,072 tools, structured output, open
10
Llama 3.3 70B Instruct (free)
OpenRouter Free Free 65,536 tools, open
11
Laguna M.1 (free)
OpenRouter Free Free 262,144 tools, reasoning, open
12
Laguna XS.2 (free)
OpenRouter Free Free 262,144 tools, reasoning, open
13
Nemotron 3 Nano Omni (free)
OpenRouter Free Free 256,000 vision, tools, reasoning, open
14
Nemotron 3 Nano 30B A3B (free)
OpenRouter Free Free 256,000 tools, reasoning, open
15
Nemotron Nano 9B V2 (free)
OpenRouter Free Free 128,000 tools, reasoning, structured output, open
16
Nemotron 3 Super (free)
OpenRouter Free Free 262,144 tools, reasoning, structured output, open
17
Nemotron Nano 12B 2 VL (free)
OpenRouter Free Free 128,000 vision, tools, reasoning, open
18
gpt-oss-20b (free)
OpenRouter Free Free 131,072 tools, reasoning, structured output, open
19
gpt-oss-120b (free)
OpenRouter Free Free 131,072 tools, reasoning, open
20
GLM 4.5 Air (free)
OpenRouter Free Free 131,072 tools, reasoning, open
21
MiniMax M2.5 (free)
OpenRouter Free Free 196,608 tools, reasoning, open
22
Gemma 3 27B (free)
OpenRouter Free Free 131,072 vision, tools, open
23
Gemma 4 31B (free)
OpenRouter Free Free 262,144 vision, tools, reasoning, open
24
Gemma 4 26B A4B (free)
OpenRouter Free Free 131,072 vision, tools, reasoning, open
25
Gemma 3 27B
Google Free Free 131,072 vision, tools, structured output, open

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Data synced daily from models.dev. Always verify pricing with the provider before deploying to production.