gpt-5.1-codex (gpt-5.1-codex) is a chat model from openai with a 272K-token context window; capabilities tools, vision, reasoning; input image, pdf, text; output text.
272KContext
128KMax output
$1.25$ / 1M in
34.7Intelligence
228.409tok / s
Pricing
Input
$1.25 / 1M tokens
Output
$10 / 1M tokens
Currency
USD
Note
Indicative US list price — verify with the vendor.
Indicative US list price — a reference only, verify with the vendor. Source: litellm. Last verified 2026-07-22.
Benchmarks
Intelligence index
34.7
Math
95.7
Cited from a public third-party leaderboard — a reference, verify at the source. Source: Artificial Analysis. Last verified 2026-07-22.
Performance
Throughput
228.409 tokens/s
Latency (TTFT)
7.034 s
Cited speed metrics — a reference, verify at the source. Source: Artificial Analysis. Last verified 2026-07-22.