Home / Compare / GPT OSS 120B vs Qwen3.5 35B A3B GPT OSS 120B vs Qwen3.5 35B A3B Close to a tie overall. GPT OSS 120B costs 80% less for the same work.
Model AClaude Fable 5 Claude Haiku 4.5 Claude Opus 4.7 Claude Opus 4.8 Claude Opus 5 Claude Opus 5.5 Claude Sonnet 4.6 Claude Sonnet 5 Claude Sonnet 5.5 DeepSeek R1 0528 DeepSeek V3 DeepSeek V3.1 DeepSeek V3.2 DeepSeek V4 Flash DeepSeek V4 Flash 0731 DeepSeek V4 Pro 0813 DeepSeek V4.1 Flash Gemini 2.5 Flash Gemini 2.5 Pro Gemini 3.1 Flash Lite Gemini 3.1 Pro Gemini 3.5 Flash Gemini 3.7 Flash Gemma 3 12B IT Gemma 3 27B IT Gemma 3 4B IT Gemma 4 26B A4B IT Gemma 4 31B IT GLM 4.6 GLM 4.7 GLM 5.2 GLM 5.3 GLM 5.3 Flash GPT OSS 120B GPT OSS 20B Granite 4.2 8B Hy4 Preview Inkling Small Kimi K2.6 Kimi K3 Ling 3.1 Flash Llama 3.3 70B Instruct Turbo Llama 4 Scout 17B 16E Instruct Meta Llama 3.1 70B Instruct Turbo Meta Llama 3.1 8B Instruct Turbo MiMo V2.6 Flash MiMo V2.6 Pro MiniMax M3 Mistral Small 24B Instruct 2501 Mistral Small 3.2 24B Instruct 2506 Muse Glimmer 30B NVIDIA Nemotron 3 Super 120B A12B NVIDIA Nemotron 3 Ultra 550B A55B NVIDIA Nemotron 3.5 Lightning Phi 4 Qwen2.5 72B Instruct Qwen3 235B A22B Instruct 2507 Qwen3 30B A3B Qwen3 32B Qwen3 Coder 480B A35B Instruct Turbo Qwen3 Next 80B A3B Instruct Qwen3 VL 235B A22B Instruct Qwen3.5 27B Qwen3.5 35B A3B Qwen3.5 397B A17B Qwen3.5 9B Qwen3.6 27B Qwen3.6 35B A3B Qwen3.7 Max Qwen3.8 27B Qwen3.8 Flash Qwen3.8 Max Seed 2.0 Pro Step 5 Preview GPT OSS 120B
by OpenAI · #53 of 67 overall
Coming soon · price at launch
Context 128K
Input / 1M $0.037
Output / 1M $0.17 Model BClaude Fable 5 Claude Haiku 4.5 Claude Opus 4.7 Claude Opus 4.8 Claude Opus 5 Claude Opus 5.5 Claude Sonnet 4.6 Claude Sonnet 5 Claude Sonnet 5.5 DeepSeek R1 0528 DeepSeek V3 DeepSeek V3.1 DeepSeek V3.2 DeepSeek V4 Flash DeepSeek V4 Flash 0731 DeepSeek V4 Pro 0813 DeepSeek V4.1 Flash Gemini 2.5 Flash Gemini 2.5 Pro Gemini 3.1 Flash Lite Gemini 3.1 Pro Gemini 3.5 Flash Gemini 3.7 Flash Gemma 3 12B IT Gemma 3 27B IT Gemma 3 4B IT Gemma 4 26B A4B IT Gemma 4 31B IT GLM 4.6 GLM 4.7 GLM 5.2 GLM 5.3 GLM 5.3 Flash GPT OSS 120B GPT OSS 20B Granite 4.2 8B Hy4 Preview Inkling Small Kimi K2.6 Kimi K3 Ling 3.1 Flash Llama 3.3 70B Instruct Turbo Llama 4 Scout 17B 16E Instruct Meta Llama 3.1 70B Instruct Turbo Meta Llama 3.1 8B Instruct Turbo MiMo V2.6 Flash MiMo V2.6 Pro MiniMax M3 Mistral Small 24B Instruct 2501 Mistral Small 3.2 24B Instruct 2506 Muse Glimmer 30B NVIDIA Nemotron 3 Super 120B A12B NVIDIA Nemotron 3 Ultra 550B A55B NVIDIA Nemotron 3.5 Lightning Phi 4 Qwen2.5 72B Instruct Qwen3 235B A22B Instruct 2507 Qwen3 30B A3B Qwen3 32B Qwen3 Coder 480B A35B Instruct Turbo Qwen3 Next 80B A3B Instruct Qwen3 VL 235B A22B Instruct Qwen3.5 27B Qwen3.5 35B A3B Qwen3.5 397B A17B Qwen3.5 9B Qwen3.6 27B Qwen3.6 35B A3B Qwen3.7 Max Qwen3.8 27B Qwen3.8 Flash Qwen3.8 Max Seed 2.0 Pro Step 5 Preview Qwen3.5 35B A3B
by Qwen · #54 of 67 overall
Coming soon · price at launch
Context 256K
Input / 1M $0.14
Output / 1M $1.00 Better overall
About even
Grade 46.1 vs 46.0
Cheaper
GPT OSS 120B
80% less, $0.070 vs $0.35 blended
Larger context
Qwen3.5 35B A3B
128K vs 256K tokens
SWE-bench Verified
Qwen3.5 35B A3B
62.4% vs 69.2%
Head to head Public benchmarks. Longer is better; each value links to its source.
LMArena Text Elo-style rating · LMArena (CC BY 4.0) · Oct 28, 2026 GPT OSS 120B GPT OSS 120B: —
Aider Polyglot % of exercises solved · Aider (aider.chat) · Aug 6, 2025 Qwen3.5 35B A3B Qwen3.5 35B A3B: —
GPT OSS 120B GPT OSS 120B: —
LiveCodeBench pass@1, % · LiveCodeBench · Feb 24, 2026 · reference GPT OSS 120B GPT OSS 120B: —
GPT OSS 120B $14.20 /month
Qwen3.5 35B A3B $68.00 /month
GPT OSS 120B saves you $53.80 a month at this usage, $646 a year.
At a glance Attribute GPT OSS 120B Qwen3.5 35B A3B Made by OpenAI Qwen Availability Coming soon Coming soon Overall grade Good · 46.1 Good · 46.0 Overall rank #53 of 67 #54 of 67 Input price $0.037 per 1M $0.14 per 1M Output price $0.17 per 1M $1.00 per 1M Context window 131,072 tokens 262,144 tokens Reasoning levels Yes Yes Reads images No Yes Model ID gpt-oss-120b qwen3.5-35b-a3b
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-120b", "messages": [...]}'
# …then swap one word
-d '{"model": "qwen3.5-35b-a3b", "messages": [...]}' Questions Is GPT OSS 120B or Qwen3.5 35B A3B better? They grade within two points of each other (46.1 and 46.0), so pick on price and the benchmarks that match your work.
Which is cheaper, GPT OSS 120B or Qwen3.5 35B A3B? GPT OSS 120B: $0.037 in and $0.17 out per million tokens, against $0.14 and $1.00 through FullsendAI.
Which has the larger context window? Qwen3.5 35B A3B, 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.
Scores: LMArena (CC BY 4.0), Aider (aider.chat), SWE-bench, Terminal-Bench, LiveCodeBench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.
