MolmoWeb 4B vs Llama 3.1 405B Instruct
At a Glance
| Compare |  MolmoWeb 4BAi2 | |
|---|---|---|
| Pricing and Limits | ||
| Context windowMaximum documented tokens | 10K | 131K |
| Model facts checked | Sep 3, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | MolmoWeb 4B | Llama-3.1-405B-Instruct |
|---|---|---|
| Developer | Ai2 | Meta |
| Family | Molmoweb | Llama 3 1 405b Instruct |
| Model | MolmoWeb 4B | Llama-3.1-405B-Instruct |
| Version | MolmoWeb 4B | Llama-3.1-405B-Instruct |
| Lifecycle | active | active |
| Released | 2026-03-20 | 2024-07-23 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 10K | 131K |
| Total parameters | 4.9B | 405.9B |
| Active parameters | Unknown | Unknown |
| License | apache-2.0 | llama3.1 |
| Open weights | Yes | Yes |
| API available | No | Yes |
| Self-hostable | Yes | Yes |
| Provider access | Unknown | Together Ai (Standard) |
| Capabilities | chat, computer-use, generation, tools, vision | chat, generation, tools |
MolmoWeb 4B Capabilities
Llama 3.1 405B Instruct Capabilities
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Primary Evidence
Sources and Freshness
Questions
MolmoWeb 4B vs Llama 3.1 405B Instruct FAQs
Is MolmoWeb 4B or Llama 3.1 405B Instruct better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both MolmoWeb 4B and Llama 3.1 405B Instruct, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, MolmoWeb 4B or Llama 3.1 405B Instruct?+
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, MolmoWeb 4B or Llama 3.1 405B Instruct?+
Llama 3.1 405B Instruct has the larger sourced context window. MolmoWeb 4B supports 10K and Llama 3.1 405B Instruct supports 131K.
Which performs better in benchmarks, MolmoWeb 4B or Llama 3.1 405B Instruct?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can MolmoWeb 4B or Llama 3.1 405B Instruct be self-hosted?+
Both models have the same recorded self-hosting status: supported. MolmoWeb 4B is open weight; Llama 3.1 405B Instruct is open weight.
Can MolmoWeb 4B and Llama 3.1 405B Instruct understand images?+
MolmoWeb 4B is documented with image input; Llama 3.1 405B Instruct is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, MolmoWeb 4B or Llama 3.1 405B Instruct?+
Neither has a larger sourced maximum output. MolmoWeb 4B is — and Llama 3.1 405B Instruct is —.
Do MolmoWeb 4B and Llama 3.1 405B Instruct support reasoning and tool use?+
MolmoWeb 4B: tool calling and image input. Llama 3.1 405B Instruct: tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, MolmoWeb 4B or Llama 3.1 405B Instruct?+
MolmoWeb 4B has 0 sourced provider routes; Llama 3.1 405B Instruct has 1, so Llama 3.1 405B Instruct has broader tracked availability.
Which offers better value, MolmoWeb 4B or Llama 3.1 405B Instruct?+
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.