GPT-5.5 (xhigh)

April 23, 2026Last synced Aug 1, 2026, 12:19 AM1050K context

Human Frontier

90.2

Human-calibrated frontier signal, backed by Arena-style preference evidence and separate from raw AgMoBench benchmark composite scores.

Blended Price

$11.25/M

Input Price

$5.00/M

Output Price

$30.00/M

Speed

—

TTFT

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Benchmark Scores

Intelligence Index

Performance Radar

GPT-5.5 (xhigh)

Field Average

External Benchmarks

AA-Omniscience Accuracy

How GPT-5.5 (xhigh) Compares

Axes

X Axis

Y Axis

Bubble Size

Filters

Blended Price (USD)$0.00 – $37.5

AgMoBench Overall≥ 1.8

Providers

ai2ai21-labsalibabaanthropicarceeawsazurebaidu

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anthropic

openai

mistral

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google

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aws

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minimax

stepfun

tencent

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multiversecomputing

xiaomi

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swiss-ai-initiative

bytedance_seed

inception

reka-ai

arcee

perplexity

Bubble size = Context Window

8191.00

2000000.00

Compare with other models

Senior SWE-Bench v2026.06senior_swe_bench

v2026.06 · official-100-task · GPT-5.5 (xhigh) · harness mini-swe-agent · effort xhigh · 1 attempt · pass@1 · harbor:snorkel-ai/senior-swe-bench-v2026.06 · provider openai/gpt-5.5 · record gpt-5-5-mini-swe · run a165e24cf1b9c072a876b82730459f2c240ba89568b769933669b4d2303dea36

View run source

Source metadata

{
  "taskCount": 100,
  "agentGroup": "mini-swe-agent:gpt-5.5",
  "basicPassAt1": 56.81818181818182,
  "datasetPackage": "snorkel-ai/senior-swe-bench-v2026.06",
  "publicTaskCount": 50,
  "tastefulPassAt1": 15.909090909090908,
  "agentDescription": "OpenAI GPT-5.5 via mini-swe-agent harness (Portkey→OpenAI)",
  "privateTaskCount": 50,
  "upstreamProvider": "openai",
  "upstreamRunCount": 78,
  "averageAgentSteps": 88.32954545454545,
  "averageOutputTokens": 35910.045454545456,
  "averageTotalCostUsd": 4.934496786363637,
  "averageOutputCostUsd": 1.0773013636363638
}

Evidence observed 2026-06-30

15.9 / 100

SWE-rebenchswe_rebench

vcontinuous-leaderboard · tasks-created:2026-03-01:2026-05-15 · gpt-5.5-2026-04-23-xhigh · harness swe-rebench-react@tools · effort xhigh · 5 attempts · pass@1 · swe-rebench:standardized:128k-or-model-limit · provider gpt-5.5-2026-04-23-xhigh__tools · record gpt-5.5-2026-04-23-xhigh__tools:1772323200000:1778803200000

View run source

Source metadata

{
  "passAt5": 70,
  "developer": "openai",
  "instanceType": "model",
  "contextPolicy": "128k unless the model supports less",
  "attemptsPerTask": 5,
  "totalTokenUsage": 2120660.0327272727,
  "modelReleaseDate": "2026-04-23",
  "scoreStandardError": 0.9090909090909094,
  "cachedTokenPercentage": 90.03088404558557,
  "modelReleaseTimestamp": 1776902400000,
  "standardContextTokens": 128000,
  "averageInstanceCostUsd": 2.245956852727273,
  "potentialContamination": true,
  "aggregateTaskRangeTimestamp": {
    "to": 1778803200000,
    "from": 1772323200000
  },
  "publishedTaskRangeTimestamp": {
    "to": 1778803200000,
    "from": 1772323200000
  }
}

Evidence observed 2026-05-15

62.7 / 100

Terminal-Bench 2.1terminal_bench

v2.1 · official-leaderboard · GPT-5.5 (xhigh) · harness terminus-2@2.0.0 · effort xhigh · 5 attempts · harbor:terminal-bench/terminal-bench-2-1 · provider openai/gpt-5.5 · record leaderboard/submissions/2026-05-01-openai-gpt-5-5-xhigh-terminus-2.json · run 10e2e56b-ed31-5f65-a489-69f78b902adf

View run source

Source metadata

{
  "passAt2": 0.8461,
  "passAt3": 0.864,
  "passAt4": 0.8719,
  "passAt5": 0.8764,
  "taskCount": 89,
  "actualTokens": {
    "output": 10768129,
    "cachedInput": 0,
    "uncachedInput": 81469069
  },
  "datasetPackage": "terminal-bench/terminal-bench-2-1",
  "leaderboardUrl": "https://www.tbench.ai/leaderboard/terminal-bench/2.1",
  "pullRequestUrl": "https://github.com/harbor-framework/terminal-bench-2-1/pull/47",
  "agentDisplayUrl": "https://www.tbench.ai/news/terminus",
  "modelDisplayUrl": "https://openai.com/index/introducing-gpt-5-5/",
  "actualTrialCount": 445,
  "agentOrganization": "Terminal-Bench",
  "modelOrganization": "OpenAI",
  "actualTotalCostUsd": 493.85,
  "rewardHacksPercent": 0.22,
  "accuracyStandardError": 1.22,
  "submissionDownloadUrl": "https://raw.githubusercontent.com/harbor-framework/terminal-bench-2-1/main/leaderboard/submissions/2026-05-01-openai-gpt-5-5-xhigh-terminus-2.json",
  "disqualifiedTrialCount": 1,
  "expectedAttemptsPerTask": 5,
  "sourceFilterReasoningEffort": "xhigh",
  "actualAverageTrialDurationSeconds": 726.7
}

Evidence observed 2026-05-01

78.0 / 100

Terminal-Bench 2.1terminal_bench

v2.1 · official-leaderboard · GPT-5.5 (xhigh) · harness codex@0.125.0 · effort xhigh · 5 attempts · harbor:terminal-bench/terminal-bench-2-1 · provider openai/gpt-5.5 · record leaderboard/submissions/2026-05-01-openai-gpt-5-5-xhigh-codex.json · run 10e2e56b-ed31-5f65-a489-69f78b902adf

View run source

Source metadata

{
  "passAt2": 0.8888,
  "passAt3": 0.9135,
  "passAt4": 0.9303,
  "passAt5": 0.9438,
  "taskCount": 89,
  "actualTokens": {
    "output": 5966373,
    "cachedInput": 392433664,
    "uncachedInput": 336797311
  },
  "datasetPackage": "terminal-bench/terminal-bench-2-1",
  "leaderboardUrl": "https://www.tbench.ai/leaderboard/terminal-bench/2.1",
  "pullRequestUrl": "https://github.com/harbor-framework/terminal-bench-2-1/pull/45",
  "agentDisplayUrl": "https://openai.com/codex/",
  "modelDisplayUrl": "https://openai.com/index/introducing-gpt-5-5/",
  "actualTrialCount": 445,
  "agentOrganization": "OpenAI",
  "modelOrganization": "OpenAI",
  "actualTotalCostUsd": 2059.19,
  "rewardHacksPercent": 0.22,
  "accuracyStandardError": 1.13,
  "submissionDownloadUrl": "https://raw.githubusercontent.com/harbor-framework/terminal-bench-2-1/main/leaderboard/submissions/2026-05-01-openai-gpt-5-5-xhigh-codex.json",
  "disqualifiedTrialCount": 1,
  "expectedAttemptsPerTask": 5,
  "sourceFilterReasoningEffort": "xhigh",
  "actualAverageTrialDurationSeconds": 482.6
}

Evidence observed 2026-05-01

83.2 / 100