GPT-OSS-20B
OpenAI · → text
Input$0.11 /M
Output$0.55 /M
← ModelsGPT-OSS-20B
Grok 4.5
GPT-OSS-20B vs Grok 4.5
Compare GPT-OSS-20B from OpenAI and Grok 4.5 from Grok on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
GPT-OSS-20BGrok 4.5+ Add model · 2/4
Grok 4.5
Grok · text, image → text
Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Input$2 /M
Output$6 /M
Cache read$0.5 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT-OSS-20B
Grok 4.5
Input /M
$0.11
$2
Output /M
$0.55
$6
Cache read /M
-
$0.5
Context length
0
500,000
Max output
0
500,000
Time to First Token
0.1 s
4.4 s
Throughput
2619.0 tok/s
34.2 tok/s
Modalities
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputslong context
API Formats
Released
August 5, 2025
July 2026
Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
GPT-OSS-20Bgrok-4.5
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
GPT-OSS-20Bgrok-4.5
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
LMArena Benchmarks
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Text
GPT-OSS-20Bgrok-4.5
12201300138014601540
Overall
13171471
Coding
13701523
Math
13361479
Hard prompts
13231495
Instruction following
12811466
Multi-turn
12921476
Creative writing
12381451
Longer query
13011487
Chinese
13491512
English
13311476
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Cost calculator
Estimate your monthly bill for the same workload on each model.
GPT-OSS-20B
$14.85 /mo
Grok 4.5
$210 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT-OSS-20B, Grok 4.5?
GPT-OSS-20B: $0.55/M output tokens; Grok 4.5: $6/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
Grok 4.5: 1523; GPT-OSS-20B: 1370 (LMArena coding leaderboard).
Which responds faster?
GPT-OSS-20B: 0.1s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Which one generates tokens faster?
GPT-OSS-20B at 2619.0 tok/s and Grok 4.5 at 34.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Can I call GPT-OSS-20B and Grok 4.5 with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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