Home / Compare / Qwen3.8 Max vs Seed 2.0 Pro Qwen3.8 Max vs Seed 2.0 Pro Qwen3.8 Max grades higher overall (87.1 against 84.3). Seed 2.0 Pro costs 55% less for the same work, and both read a 250K-token context.
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 Qwen3.8 Max
by Qwen · #7 of 67 overall
Coming soon · price at launch
Context 250K
Input / 1M $1.65
Output / 1M $4.95 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 Seed 2.0 Pro
by ByteDance · #9 of 67 overall
Coming soon · price at launch
Context 250K
Input / 1M $0.50
Output / 1M $3.00 Better overall
Qwen3.8 Max
Grade 87.1 vs 84.3
Cheaper
Seed 2.0 Pro
55% less, $1.13 vs $2.48 blended
Larger context
Same
250K vs 250K tokens
SWE-Bench Pro
Qwen3.8 Max
67.7% vs 46.9%
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 15, 2026 Seed 2.0 Pro Seed 2.0 Pro: —
Qwen3.8 Max Qwen3.8 Max: —
SWE-Bench Pro % of tasks resolved · Scale AI SWE-Bench Pro · Aug 8, 2026 · reference Seed 2.0 Pro Seed 2.0 Pro: —
Qwen3.8 Max Qwen3.8 Max: —
Qwen3.8 Max $528 /month
Seed 2.0 Pro $220 /month
Seed 2.0 Pro saves you $308 a month at this usage, $3,696 a year.
At a glance Attribute Qwen3.8 Max Seed 2.0 Pro Made by Qwen ByteDance Availability Coming soon Coming soon Overall grade Excellent · 87.1 Excellent · 84.3 Overall rank #7 of 67 #9 of 67 Input price $1.65 per 1M $0.50 per 1M Output price $4.95 per 1M $3.00 per 1M Context window 256,000 tokens 256,000 tokens Reasoning levels Yes No Reads images No Yes Model ID qwen3.8-max seed-2.0-pro
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": "qwen3.8-max", "messages": [...]}'
# …then swap one word
-d '{"model": "seed-2.0-pro", "messages": [...]}' Questions Is Qwen3.8 Max or Seed 2.0 Pro better? Qwen3.8 Max grades 87.1 against 84.3 for Seed 2.0 Pro, from public benchmarks.
Which is cheaper, Qwen3.8 Max or Seed 2.0 Pro? Seed 2.0 Pro: $0.50 in and $3.00 out per million tokens, against $1.65 and $4.95 through FullsendAI.
Which has the larger context window? Neither: both take 256,000 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), SWE-bench, 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.
