AIpedia#129 GPT-5.5
Released: · SourceGPT-5.5 is a model from OpenAI. Exact version: gpt-5.5. See the source for capabilities and limitations.
- Use cases
- Coding, Image understanding, Reasoning, Text
- Accepts
- Text & code, Images
- Produces
- Text & code
- Context
- 1050000 tokens
Access
Price USD
No verified data
Evaluator & score
Composite index · published model-group index · 20.09.2026 · Higher is better
Snapshot: 2026-09-20 · 90% CI [156.91, 161.95]
Official Epoch AI index; combines own, third-party and developer-reported results. It is not a safety audit or a media-generation score.
Conditions
Epoch Capabilities Index; official model-group estimates
Official ECI model scores, Epoch AI, CC BY 4.0. Composite of own, third-party and developer-reported results. 90% bootstrap interval. Not a per-effort score; export date is the model release date, not measurement date. Methodology: https://epoch.ai/eci#documentation
Independent run · low · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Chess Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Chess Puzzles; version: gpt-5.5_low; mode: low; source id: EnbN27oUrNyfbxuPwtZey2; file: chess_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 07.08.2026
Independent run · none · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Chess Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Chess Puzzles; version: gpt-5.5_none; mode: none; source id: XRVSYnR4bhQ8Zb62Un7GrS; file: chess_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 07.08.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
EBR-bench; Epoch AI own run; best score across scorers
Epoch AI own run; EBR-bench; version: gpt-5.5_xhigh; mode: xhigh; source id: RESzhBbTKsxwmsbBNyXCEz; file: ebr_bench.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 27.07.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath Open Problems (Erdős); Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath Open Problems (Erdős); version: gpt-5.5_xhigh; mode: xhigh; source id: bloom68-gpt55-4nh07xafb8lf7jqp; file: frontiermath_erdos.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 28.08.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tier-4-v2-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tier-4-v2-Private; version: gpt-5.5_xhigh; mode: xhigh; source id: PKSMspJiJdNThB6qNvaBSM; file: frontiermath_tier_4_v2.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 11.06.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tiers-1-3-v2-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tiers-1-3-v2-Private; version: gpt-5.5_xhigh; mode: xhigh; source id: 5FGXKvXQwGPtcCX2PNrLR5; file: frontiermath_tiers_1_3_v2.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 11.06.2026
Independent run · low · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
GPQA Diamond; Epoch AI own run; best score across scorers
Epoch AI own run; GPQA diamond; version: gpt-5.5_low; mode: low; source id: 2CdomqtBVz2it7a2Zx2G2t; file: gpqa_diamond.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 05.05.2026
Independent run · none · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
GPQA Diamond; Epoch AI own run; best score across scorers
Epoch AI own run; GPQA diamond; version: gpt-5.5_none; mode: none; source id: KesKa5EXtFG7H4UMBFzgCh; file: gpqa_diamond.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 07.08.2026
Independent run · high · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
MirrorCode; Epoch AI own run; best score across scorers
Epoch AI own run; MirrorCode; version: gpt-5.5_high; mode: high; source id: mirrorcode-ml-2l-gpt-5-5; file: mirrorcode.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 10.08.2026
Independent run · low · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mock AIME 2024/2025; Epoch AI own run; best score across scorers
Epoch AI own run; OTIS Mock AIME 2024-2025; version: gpt-5.5_low; mode: low; source id: CdmtwZ8NR8YeTXWiLVTRDJ; file: otis_mock_aime_2024_2025.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 07.08.2026
Independent run · none · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mock AIME 2024/2025; Epoch AI own run; best score across scorers
Epoch AI own run; OTIS Mock AIME 2024-2025; version: gpt-5.5_none; mode: none; source id: QuqPmMUTbiEsUvoFYZx5Mk; file: otis_mock_aime_2024_2025.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 07.08.2026
Independent run · high · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mystery Game Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Mystery Game Puzzles; version: gpt-5.5_high; mode: high; source id: Knij32Jp6bQJ2V9NHpg5VS; file: mystery_game_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 27.07.2026
Independent run · low · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mystery Game Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Mystery Game Puzzles; version: gpt-5.5_low; mode: low; source id: QHfAMMDjjzQF6xitN2vBbA; file: mystery_game_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 28.08.2026
Independent run · none · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mystery Game Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Mystery Game Puzzles; version: gpt-5.5_none; mode: none; source id: MHAMdn52f7wLMZ6MSCs5E2; file: mystery_game_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 27.08.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mystery Game Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Mystery Game Puzzles; version: gpt-5.5_xhigh; mode: xhigh; source id: EatRQnSaUpUwKzdtjYnQHo; file: mystery_game_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.07.2026
Independent run · xhigh · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
SimpleQA Verified; Epoch AI own run; best score across scorers
Epoch AI own run; SimpleQA Verified; version: gpt-5.5_xhigh; mode: xhigh; source id: TijCafTTJUFrJ6jPGvBbgq; file: simpleqa_verified.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 27.08.2026