Compare/Claude 2.1 vs gpt-oss-120B (low)

Claude 2.1vsgpt-oss-120B (low)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

Anthropic

Claude 2.1

Input
$0/M
Output
$0/M
Speed
TTFT
OpenAI

gpt-oss-120B (low)

Input
$0.15/M
Output
$0.6/M
Speed
255 tok/s
TTFT
0.51s

Winner by Category

Cheaper
Claude 2.1
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
Claude 2.1
Benchmarks (1-11)
gpt-oss-120B (low)

Pricing Comparison

MetricClaude 2.1gpt-oss-120B (low)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
Claude 2.1$0.00
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
Claude 2.1
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
Claude 2.1
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
9.324.5
Coding Index
14.015.5
Math Index
66.7
GPQA Diamond
31.9%67.2%
MMLU-Pro
49.5%77.5%
LiveCodeBench
19.5%70.7%
AIME 2025
66.7%
MATH-500
37.4%
Humanity's Last Exam
4.2%5.2%
SciCode
18.4%36.0%
IFBench
58.3%
TerminalBench
5.3%
Claude 2.11 wins
11 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, Claude 2.1 or gpt-oss-120B (low)?

Claude 2.1 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120B (low).

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 11 out of 12 benchmarks compared to 1 for Claude 2.1. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (low) generates tokens faster at 255 tok/s vs 0 tok/s. Claude 2.1 also has lower time-to-first-token (0.00s vs 0.51s).

When should I use Claude 2.1 vs gpt-oss-120B (low)?

Choose based on your priorities: Claude 2.1 for lower cost, gpt-oss-120B (low) for stronger benchmark performance, and gpt-oss-120B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.