Is Phi-4 or SmolLM2 1.7B cheaper?

Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.

Which has the larger context window?

Phi-4 accepts 16K tokens vs 8.2K for SmolLM2 1.7B.

Is Phi-4 or SmolLM2 1.7B better for coding?

Both Phi-4 and SmolLM2 1.7B are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.

Are either of these models open source?

Both ship with open weights. Phi-4 is licensed under MIT; SmolLM2 1.7B under Apache-2.0.

When were Phi-4 and SmolLM2 1.7B released?

Phi-4 was released by Microsoft on 2024-12-12. SmolLM2 1.7B was released by Other on 2024-11-01.

Is Phi-4 or SmolLM2 1.7B cheaper?

Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.

Which has the larger context window?

Phi-4 accepts 16K tokens vs 8.2K for SmolLM2 1.7B.

Is Phi-4 or SmolLM2 1.7B better for coding?

Both Phi-4 and SmolLM2 1.7B are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.

Are either of these models open source?

Both ship with open weights. Phi-4 is licensed under MIT; SmolLM2 1.7B under Apache-2.0.

When were Phi-4 and SmolLM2 1.7B released?

Phi-4 was released by Microsoft on 2024-12-12. SmolLM2 1.7B was released by Other on 2024-11-01.

Phi-4 vs SmolLM2 1.7B

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

UpdatedApr 30, 2026

Phi-4 specs · SmolLM2 1.7B specs

Verdict by category

PriceTie
Neither model publishes per-token API pricing.
Context windowPhi-4
Phi-4 accepts 16K tokens vs 8.2K, 2.0× the room for long documents and codebases.
BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
ModalitiesTie
Both handle text.
OpennessTie
Both ship open weights, self-host either one.

On balance Phi-4 edges ahead, winning 1 of 5 categories against SmolLM2 1.7B's 0. Neither model publishes per-token API pricing. Phi-4 accepts 16K tokens vs 8.2K, 2.0× the room for long documents and codebases.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. Both target the same set of modalities (text), so the deciding factors are price, context, and raw quality. Both ship open weights, self-host either one.

Phi-4 is the newer of the two, released 1 months after SmolLM2 1.7B, which usually means a more recent knowledge cutoff and updated safety post-training. Phi-4 is usually picked for on device and edge deployment workloads, while SmolLM2 1.7B sees more deployments in on device and edge deployment. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

Spec	Phi-4	SmolLM2 1.7B
Provider	Microsoft	Other
Released	Dec 2024	Nov 2024
Modalities	text	text
Context window	16K tokens	8.2K tokens
Max output	,	,
Input · 1M	Pricing not published	Pricing not published
Output · 1M	Pricing not published	Pricing not published
Knowledge cutoff	,	,
Open weights	Yes (MIT)	Yes (Apache-2.0)
API available	Yes	No

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

Light usage, 100k in / 50k out per day, vs ,
Heavy usage, 1M in / 500k out per day, vs ,
RAG workload, 5M in / 200k out per day, vs ,

Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

Input tokens / dayOutput tokens / dayHorizon

Phi-4Pricing unavailable
SmolLM2 1.7BPricing unavailable

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Phi-4SmolLM2 1.7B

MMLU84.8
HumanEval82.6

Pick Phi-4 if

Phi-4 fits when…

Exceptional quality at 14B parameters
MIT license, clean commercial use
Strong on math
Long-context tasks, handles 16K tokens vs 8.2K for SmolLM2 1.7B.

Pick SmolLM2 1.7B if

SmolLM2 1.7B fits when…

Truly tiny
Apache-2.0
Runs on phones

Don't want either?

Consider Phi-3.5 Medium

14B Phi-3.5, predecessor to Phi-4 with strong benchmark efficiency for its size.

See Phi-3.5 Medium specs Phi-4 vs Phi-3.5 Medium SmolLM2 1.7B vs Phi-3.5 Medium

Frequently asked

Is Phi-4 or SmolLM2 1.7B cheaper?
Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.
Which has the larger context window?
Phi-4 accepts 16K tokens vs 8.2K for SmolLM2 1.7B.
Is Phi-4 or SmolLM2 1.7B better for coding?
Both Phi-4 and SmolLM2 1.7B are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
Are either of these models open source?
Both ship with open weights. Phi-4 is licensed under MIT; SmolLM2 1.7B under Apache-2.0.
When were Phi-4 and SmolLM2 1.7B released?
Phi-4 was released by Microsoft on 2024-12-12. SmolLM2 1.7B was released by Other on 2024-11-01.

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