GPT-5.1-codex Benchmarks

Provider: openai

Explore real-world latency and throughput results for GPT-5.1-codex. These measurements come from automated benchmarking runs against the provider APIs using the same harness that powers the public cloud dashboard.

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Benchmark Overview

Avg Tokens / Second

26.30

Avg Time to First Token (ms)

1080.00

Runs Analysed

234

Last Updated

Feb 12, 2026, 12:02 PM

Key Insights

  • GPT-5.1-codex streams at 26.30 tokens/second on average across the last 234 benchmark runs.

  • Performance fluctuated by 44.43 tokens/second (168.9% coefficient of variation), indicating variable behavior across benchmark runs.

  • Average time to first token is 1080.00 ms (moderate latency), consider alternatives for latency-sensitive workloads.

  • Latest measurements completed on Feb 12, 2026, 12:02 PM based on 234 total samples.

Performance Distribution

Distribution of throughput measurements showing performance consistency across benchmark runs.

Performance Over Time

Historical performance trends showing how throughput has changed over the benchmarking period.

GPT-5.1-codex

Benchmark Samples

ProviderModelAvg Toks/SecMinMaxAvg TTF (ms)
openaiGPT-5.1-codex26.303.6748.101080.00

Frequently Asked Questions

The latest rolling average throughput is 26.30 tokens per second with an average time to first token of 1080.00 ms across 234 recent runs.

Benchmarks refresh automatically whenever the monitoring cron runs. The most recent run completed on Feb 12, 2026, 12:02 PM.

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