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GPT OSS 20B vs Llama 3.3 70B Instruct Turbo

GPT OSS 20B grades higher overall (36.3 against 33.7). GPT OSS 20B costs 63% less for the same work, and both read a 128K-token context.

GPT OSS 20B

by OpenAI · #58 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.030
Output / 1M
$0.14

Llama 3.3 70B Instruct Turbo

by Meta · #60 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.10
Output / 1M
$0.32

Better overall

GPT OSS 20B

Grade 36.3 vs 33.7

Cheaper

GPT OSS 20B

63% less, $0.058 vs $0.15 blended

Larger context

Same

128K vs 128K 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 28, 2026
Llama 3.3 70B Instruct TurboLlama 3.3 70B Instruct Turbo: 1,318
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 28, 2026
Llama 3.3 70B Instruct TurboLlama 3.3 70B Instruct Turbo: 1,346
SWE-bench Verified% of issues resolved · SWE-bench · Aug 5, 2025 · reference
Llama 3.3 70B Instruct TurboLlama 3.3 70B Instruct Turbo: —

GPT OSS 20BLlama 3.3 70B Instruct Turbov = 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.

GPT OSS 20B$11.60 /month
Llama 3.3 70B Instruct Turbo$32.80 /month

GPT OSS 20B saves you $21.20 a month at this usage, $254 a year.

At a glance

AttributeGPT OSS 20BLlama 3.3 70B Instruct Turbo
Made byOpenAIMeta
AvailabilityComing soonComing soon
Overall gradeGood · 36.3Good · 33.7
Overall rank#58 of 67#60 of 67
Input price$0.030 per 1M$0.10 per 1M
Output price$0.14 per 1M$0.32 per 1M
Context window131,072 tokens131,072 tokens
Reasoning levelsYesNo
Reads imagesNoNo
Model IDgpt-oss-20bllama-3.3-70b-instruct-turbo

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": "gpt-oss-20b", "messages": [...]}'

# …then swap one word
  -d '{"model": "llama-3.3-70b-instruct-turbo", "messages": [...]}'

Questions

Is GPT OSS 20B or Llama 3.3 70B Instruct Turbo better?

GPT OSS 20B grades 36.3 against 33.7 for Llama 3.3 70B Instruct Turbo, from public benchmarks.

Which is cheaper, GPT OSS 20B or Llama 3.3 70B Instruct Turbo?

GPT OSS 20B: $0.030 in and $0.14 out per million tokens, against $0.10 and $0.32 through FullsendAI.

Which has the larger context window?

Neither: both take 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), SWE-bench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.