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Ling 3.1 Flash vs Phi 4

Phi 4 has the stronger public benchmark scores. Phi 4 costs 81% less for the same work.

Ling 3.1 Flash

by inclusionAI

Coming soon · price at launch
Context
256K
Input / 1M
$0.30
Output / 1M
$0.90

Phi 4

by Microsoft · #66 of 67 overall

Coming soon · price at launch
Context
16K
Input / 1M
$0.070
Output / 1M
$0.14

Better overall

Phi 4

Grade — vs 15.5

Cheaper

Phi 4

81% less, $0.087 vs $0.45 blended

Larger context

Ling 3.1 Flash

256K vs 16K tokens

Head to head

Public benchmarks. Longer is better; each value links to its source.

LMArena TextElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Ling 3.1 FlashLing 3.1 Flash: —
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Ling 3.1 FlashLing 3.1 Flash: —
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Oct 13, 2026 · reference
Phi 4Phi 4: —
Terminal-Bench 4.0% of tasks passed · Terminal-Bench · Oct 13, 2026 · reference
Ling 3.1 FlashLing 3.1 Flash: 46%v
Phi 4Phi 4: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Oct 13, 2026 · reference
Phi 4Phi 4: —

Ling 3.1 FlashPhi 4v = reported by the model’s maker. — = no public score yet. Arena bars span the range across every model we grade.

What it costs you

Drag to match your monthly usage.

Ling 3.1 Flash$96.00 /month
Phi 4$19.60 /month

Phi 4 saves you $76.40 a month at this usage, $917 a year.

At a glance

AttributeLing 3.1 FlashPhi 4
Made byinclusionAIMicrosoft
AvailabilityComing soonComing soon
Overall gradeNot ratedGood · 15.5
Overall rankNot ranked#66 of 67
Input price$0.30 per 1M$0.070 per 1M
Output price$0.90 per 1M$0.14 per 1M
Context window262,144 tokens16,384 tokens
Reasoning levelsNoNo
Reads imagesNoNo
Model IDling-3.1-flashphi-4

Try both with one key

Same endpoint, same key, both hosted in the USA. Change one word to switch models, in Claude Code, Cursor, Cline or your own code.

Get your API key
# Ask either model the same thing
curl https://fullsendai.com/v1/chat/completions \
  -H "Authorization: Bearer $FULLSEND_API_KEY" \
  -d '{"model": "ling-3.1-flash", "messages": [...]}'

# …then swap one word
  -d '{"model": "phi-4", "messages": [...]}'

Questions

Is Ling 3.1 Flash or Phi 4 better?

One of them doesn’t have enough public benchmark scores to be graded yet; compare the benchmarks both have above.

Which is cheaper, Ling 3.1 Flash or Phi 4?

Phi 4: $0.070 in and $0.14 out per million tokens, against $0.30 and $0.90 through FullsendAI.

Which has the larger context window?

Ling 3.1 Flash, with 262,144 tokens.

Can I use both with one API key?

Yes, once they launch: both are coming soon, at the prices shown, and both will use the same FullsendAI key.

Model rankingsAll benchmarksCompare other models

Scores: LMArena (CC BY 4.0), Scale AI SWE-Bench Pro, Terminal-Bench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.