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Leaderboard / OpenAI

GPT-5.1

OpenAI CLOSED Proprietary
Other settings:High · 64Medium
Verdict

GPT-5.1 is a solid mid-pack model: #172 of 406 by SIscope score. Strongest at following instructions, weaker at coding. Mid-range on price.

SIscope score
52
#172 of 406
Human-vote rank
#112
of 419 · score 1422
Price per 1M tokens, blended
$3.44
$1.25 in · $10 out
Context window
400K
400,000 tokens

Shape

Each spoke is a category, 0 at the centre, 100 at the edge.

CodingAgentsno data yetReasoningMathChatInstructions

Category scores

Percentiles: 90 means better than about 90% of tested models.

Coding45
Agents & toolsNo data yet–
Reasoning & knowledge57
Math45
Chat quality73
Following instructions78

What goes into each category · Compare with DeepSeek V4.1 Flash

Human-vote score over time

Text arena, recent updates.

141514231430Oct 20: 1422.2 (rank #112)Oct 22: 1422.2 (rank #111)Oct 28: 1422.2 (rank #112)Oct 20Oct 28

Coding votes over time

WebDev arena, recent updates.

133513431350Oct 16: 1341.7 (rank #115)Oct 18: 1341.8 (rank #116)Oct 19: 1341.7 (rank #119)Oct 22: 1341.6 (rank #120)Oct 23: 1341.7 (rank #121)Oct 27: 1341.6 (rank #122)Oct 28: 1341.3 (rank #123)Oct 16Oct 28

Independent test runs

Run by Epoch AI on the same harness for every model. Bars show the share of questions answered correctly.

GPQA Diamond67%
PhD-level science multiple choice questions
Better than 38% of 333 tested models. Run Aug 7, 2026.
OTIS Mock AIME 2024-2538%
Competition maths problems in the style of AIME
Better than 27% of 313 tested models. Run Aug 7, 2026.

Human-vote arenas

People compare two anonymous answers and pick the better one. Scores work like chess ratings.

ArenaRankScoreRange (95%)VotesUpdated
Text arena
Everyday chat, blind human votes
#112 of 41914221419–142644,413Oct 28, 2026
WebDev arena
Building web apps, blind human votes
#123 of 15213411333–135010,675Oct 28, 2026
Vision arena
Questions about images, blind human votes
#77 of 16712351227–124210,801Oct 19, 2026
Agent arena
Real multi-step agent sessions
Not on this board yet

Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.

Price

Input
$1.25
per 1M tokens
Output
$10
per 1M tokens
Blended
$3.44
3 in : 1 out, per 1M
Context window
400K
max tokens per request
Speed
Coming soon
our own tests

List price from the OpenRouter models API (openai/gpt-5.1), Nov 4, 2026. Providers can charge differently.