Molmo2 8B vs MolmoAct 2
At a Glance
| Compare | Molmo2 8BAi2 | MolmoAct 2Ai2 |
|---|---|---|
| Pricing and Limits | ||
| Context windowMaximum documented tokens | 37K | Not reported |
| Model facts checked | Aug 28, 2026View model evidence → | Aug 29, 2026View model evidence → |
Available Benchmarks
Side-by-Side Facts
| Field | Molmo2-8B | MolmoAct 2 |
|---|---|---|
| Developer | Ai2 | Ai2 |
| Family | Molmo2 8b | MolmoAct 2 |
| Model | Molmo2-8B | MolmoAct 2 |
| Version | Molmo2-8B | 2 |
| Lifecycle | active | active |
| Released | Unknown | 2026-05-05 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text, Image, Robot state |
| Output modalities | Text | Robot action |
| Context window | 37K | Unknown |
| Total parameters | 8.7B | 5B |
| Active parameters | Unknown | Unknown |
| License | apache-2.0 | apache-2.0 |
| Open weights | Yes | Yes |
| API available | Unknown | No |
| Self-hostable | Yes | Yes |
| Provider access | Unknown | Unknown |
| Capabilities | chat, generation | action-reasoning, bimanual-manipulation, depth-reasoning, fine-tuning |
| Robotics model type | Unknown | Action reasoning model |
| Action representation | Unknown | Flow-matching continuous action expert |
| Control architecture | Unknown | Molmo 2-ER backbone with KV-cache bridge and action expert |
| Inference location | Unknown | Flexible |
| Native control rate (Hz) | Unknown | Unknown |
| Supported embodiments | Unknown | SO-100, SO-101, Franka, WidowX, bimanual YAM |
| Training data | Unknown | Open bimanual YAM, SO-100/SO-101, DROID, BC-Z, Fractal, Bridge, and prior MolmoAct data described by Ai2. |
Molmo2 8B Capabilities
MolmoAct 2 Capabilities
Primary Evidence
Sources and Freshness
Questions
Molmo2 8B vs MolmoAct 2 FAQs
Is Molmo2 8B or MolmoAct 2 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Molmo2 8B and MolmoAct 2, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Molmo2 8B or MolmoAct 2?+
Neither model has a directly sourced input price in this comparison. Neither model has a directly sourced output price in this comparison.
Which has a larger context window, Molmo2 8B or MolmoAct 2?+
Neither model has a larger sourced context window in this comparison. Molmo2 8B is 37K and MolmoAct 2 is —.
Which performs better in benchmarks, Molmo2 8B or MolmoAct 2?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Molmo2 8B or MolmoAct 2 be self-hosted?+
Both models have the same recorded self-hosting status: supported. Molmo2 8B is open weight; MolmoAct 2 is open weight.
Can Molmo2 8B and MolmoAct 2 understand images?+
Molmo2 8B is documented with image input; MolmoAct 2 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Molmo2 8B or MolmoAct 2?+
Neither has a larger sourced maximum output. Molmo2 8B is — and MolmoAct 2 is —.
Do Molmo2 8B and MolmoAct 2 support reasoning and tool use?+
Molmo2 8B: image input. MolmoAct 2: reasoning and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Molmo2 8B or MolmoAct 2?+
Molmo2 8B has 0 sourced provider routes; MolmoAct 2 has 0, a tie.
Which offers better value, Molmo2 8B or MolmoAct 2?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.