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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

Every score has a dated snapshot.

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  2. Comparisons
  3. OpenAI: o4 Mini vs Seed 2.1 Turbo

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

OpenAI: o4 Mini vs Seed 2.1 Turbo benchmark

In this head-to-head showdown, Seed 2.1 Turbo is more budget-friendly at $2.5/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose OpenAI: o4 Mini if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Seed 2.1 Turbo if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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OpenAI
OpenAI: o4 Mini

Auto-discovered from OpenRouter (openai/o4-mini). Preview until a second source matches.

$4.4/1M out
ByteDance
Seed 2.1 Turbo

ByteDance Seed 2.1 Turbo, listed on public model timelines as an Aug 10 2026 API drop.

Seed 2.1Elo 1,472$2.5/1M out
Top Rival Showdowns for OpenAI: o4 Mini
All Matchups
Compare vs:vs Claude Opus 4.5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar Leader

Seed 2.1 Turbo

$2.5 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect
Percentile 0–100
Dimensional AdvantageSeed 2.1 Turbo 6/6
Head-to-Head Comparison

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

OpenAI: o4 Mini (0)vsSeed 2.1 Turbo (10)
OpenAI: o4 Mini: 0W (0%)Overall: Seed 2.1 TurboSeed 2.1 Turbo: 10W (100%)
← OpenAI: o4 MiniSeed 2.1 Turbo →
Seed 2.1 Turbo (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo
—vs1,472
Coding Elo
—vs1,480
SWE-bench
—vs63.2%
LiveBench
—vs64.8%
GPQA Diamond
—vs76.8%
OpenAI: o4 Mini: 0WSeed 2.1 Turbo: 5W
Seed 2.1 Turbo (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed
—vs160 tok/s
Time to first token
—vs120 ms
OpenAI: o4 Mini: 0WSeed 2.1 Turbo: 2W
Seed 2.1 Turbo (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price
$4.4/1Mvs$2.5/1M
Input price
$1.1/1Mvs$0.5/1M
Context window
200kvs262k
OpenAI: o4 Mini: 0WSeed 2.1 Turbo: 3W

Side-by-Side Benchmark Matrix

Preference Elo
OpenAI: o4 Mini—
Seed 2.1 Turbo1,472
lmarena · Aug 16, 2026
Coding Elo
OpenAI: o4 Mini—
Seed 2.1 Turbo1,480
lmarena · Aug 16, 2026
LiveBench
OpenAI: o4 Mini—
Seed 2.1 Turbo64.8%
livebench · Aug 16, 2026
SWE-bench
OpenAI: o4 Mini—
Seed 2.1 Turbo63.2%
swebench · Aug 16, 2026
GPQA Diamond
OpenAI: o4 Mini—
Seed 2.1 Turbo76.8%
seed-bootstrap · Aug 16, 2026
Time to first token
OpenAI: o4 Mini—
Seed 2.1 Turbo120 ms
seed-bootstrap · Aug 16, 2026
Output speed
OpenAI: o4 Mini—
Seed 2.1 Turbo160 tok/s
seed-bootstrap · Aug 16, 2026
Input priceSeed 2.1 Turbo (+$0.6/1M)
OpenAI: o4 Mini$1.1/1M
openrouter · Aug 17, 2026
Seed 2.1 Turbo$0.5/1M
openrouter · Aug 17, 2026
Output priceSeed 2.1 Turbo (+$1.9/1M)
OpenAI: o4 Mini$4.4/1M
openrouter · Aug 17, 2026
Seed 2.1 Turbo$2.5/1M
openrouter · Aug 17, 2026
Context windowSeed 2.1 Turbo (+62k)
OpenAI: o4 Mini200k
openrouter · Aug 17, 2026
Seed 2.1 Turbo262k
openrouter · Aug 17, 2026
BenchmarkOpenAI: o4 MiniSeed 2.1 TurboAdvantage Delta
Preference Elo—
1,472
lmarena · Aug 16, 2026
—
Coding Elo—
1,480
lmarena · Aug 16, 2026
—
LiveBench—
64.8%
livebench · Aug 16, 2026
—
SWE-bench—
63.2%
swebench · Aug 16, 2026
—
GPQA Diamond—
76.8%
seed-bootstrap · Aug 16, 2026
—
Time to first token—
120 ms
seed-bootstrap · Aug 16, 2026
—
Output speed—
160 tok/s
seed-bootstrap · Aug 16, 2026
—
Input price
$1.1/1M
openrouter · Aug 17, 2026
$0.5/1M
openrouter · Aug 17, 2026
Seed 2.1 Turbo (+$0.6/1M)
Output price
$4.4/1M
openrouter · Aug 17, 2026
$2.5/1M
openrouter · Aug 17, 2026
Seed 2.1 Turbo (+$1.9/1M)
Context window
200k
openrouter · Aug 17, 2026
262k
openrouter · Aug 17, 2026
Seed 2.1 Turbo (+62k)
Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 47% with Seed 2.1 Turbo
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
OpenAI: o4 Mini$104.50 / mo
In: $38.5Out: $66
Seed 2.1 Turbo$55.00 / mo
In: $17.5Out: $37.5
Estimated Cost Delta

Seed 2.1 Turbo is estimated to save $49.50/month ($594/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Seed 2.1 Turbo:Pick Seed 2.1 Turbo when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatSeed 2.1 Turbo

Lower output list price ($2.5/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGSeed 2.1 Turbo

Larger window (262k).

Screenshots / visionSeed 2.1 Turbo

Seed 2.1 Turbo is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatSeed 2.1 TurboLower output list price ($2.5/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGSeed 2.1 TurboLarger window (262k).
Screenshots / visionSeed 2.1 TurboSeed 2.1 Turbo is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
launchAug 10, 2026

Seed 2.1 Turbo (Aug 10): ByteDance’s API drop on the public timeline

Listed on public model timelines as an Aug 10 2026 API drop. Preview-quality story, indexable because we have a full snapshot.

Community Sentiment

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CompareLLM Matrix

Verified head-to-head card

LIVE
VS
OpenAI

OpenAI: o4 Mini

Elo n/a
LiveBench—
SWE-bench—
Speed—
Output cost$4.4/1M
ByteDance

Seed 2.1 Turbo

Elo 1,472
LiveBench64.8%
SWE-bench63.2%
Speed160 tok/s
Output cost$2.5/1M

Frequently Asked Questions

Which is better overall, OpenAI: o4 Mini or Seed 2.1 Turbo?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, OpenAI: o4 Mini or Seed 2.1 Turbo?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
Seed 2.1 Turbo output tokens are $2.5/1M versus $4.4/1M. Input prices and retry rates still move the real bill.
Which is faster, OpenAI: o4 Mini or Seed 2.1 Turbo?
We do not have TTFT for both models.
Which has the larger context window?
Seed 2.1 Turbo accepts 262k tokens versus 200k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. OpenAI: o4 Mini and Seed 2.1 Turbo Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Aug 10, 2026

    Seed 2.1 Turbo (Aug 10): ByteDance’s API drop on the public timeline

Similar Head-to-Head Comparisons

All OpenAI: o4 Mini matchups →|All Seed 2.1 Turbo matchups →
GPT-5 vs Seed 2.1 TurboDoubao Pro 1.5 vs Seed 2.1 TurboGPT-4.5 Orion vs Seed 2.1 TurboGPT-5.6 Sol vs Seed 2.1 TurboGPT-5.6 Terra vs Seed 2.1 TurboGPT-5 mini vs Seed 2.1 Turbo