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OpenAI

GPT-5.5 xhigh

AA leaderboard puts GPT-5.5 xhigh at 60; Kilo lists GPT-5.5 #1 coding at 74.2% completion, $72.63 per attempt.

78 Floor score

confidence: medium

78 Floor Capability

Finished benchmark shape.

86 Operating Envelope

Best tracked DSWE pass rate with relatively low cost, short time, and compact output.

87 Frontier Reality

AA Index 60 / Kilo #1 coding

75 Research Trust

Capability signal is strong, but abstention, citation, and hallucination evidence is thinner.

Current signal

AA Index 60 / Kilo #1 coding

Evidence completeness

70%

5 score dimensions represented.

Calculation

Score components

76 Accuracy + grounding

Correct, grounded answers on ordinary verifiable tasks.

80 Instruction discipline

Follows exact user constraints and output formats.

74 Honesty + reliability

Avoids unsupported confidence and remains stable across runs.

82 Reasoning floor

Handles non-flashy reasoning without brittle failures.

88 Agent/coding

Completes tool, coding, and agent-style tasks when evidence exists.

66 Operating envelope

Cost, speed, token burn, verbosity, and friction.

Caveat

What to watch

Very strong capability and coding signal, but less floor-specific hallucination/abstention evidence in the current public rows.

Meaning

How to read the score

Each score is a 0-100 saturation scale. A score of 100 means that benchmark lane is complete for this model. Floor Capability is the finished benchmark shape; Operating Envelope, Frontier Reality, and Research Trust are provisional tabs that need prompt-pack backfill. Confidence is evidence quality, not another model grade. Evidence % is source coverage, not capability.

Citations

Benchmark sources

Artificial Analysis Intelligence IndexKilo BenchArena TextArena Agent