Skip to content

Meta Llama 3.1 8B Instruct Turbo vs Phi 4

Phi 4 grades higher overall (15.5 against 0.0). Meta Llama 3.1 8B Instruct Turbo costs 71% less for the same work.

Meta Llama 3.1 8B Instruct Turbo

by Meta · #67 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.020
Output / 1M
$0.040

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 0.0 vs 15.5

Cheaper

Meta Llama 3.1 8B Instruct Turbo

71% less, $0.025 vs $0.087 blended

Larger context

Meta Llama 3.1 8B Instruct Turbo

128K 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
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: 1,211
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: 1,260

Meta Llama 3.1 8B Instruct TurboPhi 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.

Meta Llama 3.1 8B Instruct Turbo$5.60 /month
Phi 4$19.60 /month

Meta Llama 3.1 8B Instruct Turbo saves you $14.00 a month at this usage, $168 a year.

At a glance

AttributeMeta Llama 3.1 8B Instruct TurboPhi 4
Made byMetaMicrosoft
AvailabilityComing soonComing soon
Overall gradeGood · 0.0Good · 15.5
Overall rank#67 of 67#66 of 67
Input price$0.020 per 1M$0.070 per 1M
Output price$0.040 per 1M$0.14 per 1M
Context window131,072 tokens16,384 tokens
Reasoning levelsNoNo
Reads imagesNoNo
Model IDmeta-llama-3.1-8b-instruct-turbophi-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": "meta-llama-3.1-8b-instruct-turbo", "messages": [...]}'

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

Questions

Is Meta Llama 3.1 8B Instruct Turbo or Phi 4 better?

Phi 4 grades 15.5 against 0.0 for Meta Llama 3.1 8B Instruct Turbo, from public benchmarks.

Which is cheaper, Meta Llama 3.1 8B Instruct Turbo or Phi 4?

Meta Llama 3.1 8B Instruct Turbo: $0.020 in and $0.040 out per million tokens, against $0.070 and $0.14 through FullsendAI.

Which has the larger context window?

Meta Llama 3.1 8B Instruct Turbo, with 131,072 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), and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.