AFM 4.5B
Last refreshed 2026-04-18. Next refresh: weekly.
AFM 4.5B has model metadata, but missing tracked provider pricing keeps it from being a default production pick.
Decision context: Coding task fit, 0 tracked provider routes, and research from 2026-04-15.
Use it for
- Teams evaluating general LLM work
- Workloads that can use a 66k context window
Do not use it for
- Cost-sensitive launches that need sourced token pricing
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
Cheapest output
-
No tracked output price
Provider routes
0
No provider route in seed
Quality / dollar
Unknown
No task benchmark coverage yet
Freshness
2026-04-15
Researched 46d ago
Top use-case fit
No primary decision-task fit is mapped for this model yet.
Provider price ladder
No tracked provider token pricing is available for this model yet.
Benchmark peer barsfor Coding
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
About
Arcee Foundation Model 4.5B — a dense 4.5B parameter model and proof-of-concept for the Trinity MoE series. Trained on 8T tokens. Extended to 64K context (from original 32K) in a subsequent update. Full open-source release July 2025 under Apache 2.0. Note: previously mislabeled as 'Trinity 4.5B' in some databases; it is a separate model family from the Trinity MoE line.
AFM 4.5B has a 66k-token context window.
Capabilities
No model capability flags are currently sourced.