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

Claude Instantvsgpt-oss-120B (low)

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

Anthropic

Claude Instant

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

Pricing Comparison

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

Speed Comparison

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

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
7.424.5
Coding Index
7.815.5
Math Index
66.7
GPQA Diamond
33.0%67.2%
MMLU-Pro
43.4%77.5%
LiveCodeBench
10.9%70.7%
AIME 2025
66.7%
MATH-500
26.4%
Humanity's Last Exam
3.8%5.2%
SciCode
36.0%
IFBench
58.3%
TerminalBench
5.3%
Claude Instant1 wins
11 winsgpt-oss-120B (low)

Frequently Asked Questions

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

Claude Instant 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 Instant. 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 Instant also has lower time-to-first-token (0.00s vs 0.51s).

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

Choose based on your priorities: Claude Instant 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.