GPT-6 Luna
- Input price
- $0.10
- Per 1 million tokens (USD)
- Output price
- $0.50
- Per 1 million tokens (USD)
- Effort levels
- 6total
- Default: Med
- Benchmark results
- 26total
- Benchmark types: 18
Model information
- API model ID
- gpt-6-luna
- release date
- 2026-09-22
- effort
- None / Low / Med (default) / High / Xhigh / Max
- Effort source
- Based on reasoning effort on the OpenAI model page (developers.openai.com/api/docs/models/gpt-6-luna).
- Claude Code
- unavailable
- Codex
- available
- Availability notes
- Codex desktop app / CLI / IDE. 'GPT-6 Luna supports reasoning efforts up to Max, but not Ultra.' Enterprise/Edu requires administrator enablement. Claude Code's official model list (code.claude.com/docs/en/model-config alias table) contains only Anthropic models, so claudeCode is false (connections via a gateway are not counted as official options).
- Availability source
- https://learn.chatgpt.com/docs/models
Price (USD per 1 million tokens)
Prices do not vary by effort; token consumption does.
| input | $0.10 |
|---|---|
| output | $0.50 |
| cache read | $0.01 |
| cache write | $0.13 |
Prompts with more than 272K input tokens are priced at 2x input and cache rates and 1.5x output for the full request. Batch/Flex 50%, Fast 2x.
| gpt-6-luna | $0.10 | $0.50 | $0.01 | $0.125 | $0.25 | $0.20 | $0.75 | $0.02 | $0.25 | $0.50 |Benchmark results
| Benchmark | effort | Score | Source cost (metric) | measured/reported by | source | Conditions and extraction method |
|---|---|---|---|---|---|---|
| Terminal-Bench 4.0not stated | not stated | 16.4% | — | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); values for other vendor models (as listed by Anthropic)transcribed from tableSource excerpt16.4%Location Table, Terminal-Bench 4.0 row: 16.4 |
| FrontierCode v1.1(main set)not stated | not stated | 42.4% | — | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); values for other vendor models (as listed by Anthropic)transcribed from tableSource excerpt42.4%Location Table, FrontierCode v1.1 (Main) row: 42.4 |
| GDPval-AA v2.1Low | Low | 1,036 | $0.004Cost per task | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Low" was mapped to low in the OpenAI API reasoning efforttranscribed from textSource excerptGDPval-AA v2.1 — Accuracy vs. cost: "GPT-6 Luna · Low: 1036.0 $0.004" |
| GDPval-AA v2.1Med (default) | Med | 1,262 | $0.02Cost per task | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Med" was mapped to medium in the OpenAI API reasoning efforttranscribed from textSource excerptGDPval-AA v2.1 — Accuracy vs. cost: "GPT-6 Luna · Med: 1262.0 $0.02" |
| GDPval-AA v2.1High | High | 1,344 | $0.03Cost per task | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "High" was mapped to high in the OpenAI API reasoning efforttranscribed from textSource excerptGDPval-AA v2.1 — Accuracy vs. cost: "GPT-6 Luna · High: 1344.0 $0.03" |
| GDPval-AA v2.1Xhigh | Xhigh | 1,364 | $0.05Cost per task | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Xhigh" was mapped to xhigh in the OpenAI API reasoning efforttranscribed from textSource excerptGDPval-AA v2.1 — Accuracy vs. cost: "GPT-6 Luna · Xhigh: 1364.0 $0.05" |
| GDPval-AA v2.1Max | Max | 1,437 | $0.09Cost per task | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Max" was mapped to max in the OpenAI API reasoning efforttranscribed from textSource excerptGDPval-AA v2.1 — Accuracy vs. cost: "GPT-6 Luna · Max: 1437.0 $0.09" |
| AA-Briefcase v1.1(Elo)not stated | not stated | 1,336 | — | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); values for other vendor models (as listed by Anthropic)transcribed from tableSource excerpt1336Location Table, AA-Briefcase v1.1 (Elo) row: 1336 |
| OSWorld 2.1(offline subset)Low | Low | 19.2% | $0.04Cost per attempt | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Low" was mapped to low in the OpenAI API reasoning efforttranscribed from textSource excerptOSWorld 2.1 (offline subset) — Accuracy vs. cost: "GPT-6 Luna · Low: 19.2% $0.04" |
| OSWorld 2.1(offline subset)Med (default) | Med | 37.5% | $0.13Cost per attempt | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Med" was mapped to medium in the OpenAI API reasoning efforttranscribed from textSource excerptOSWorld 2.1 (offline subset) — Accuracy vs. cost: "GPT-6 Luna · Med: 37.5% $0.13" |
| OSWorld 2.1(offline subset)High | High | 42.3% | $0.14Cost per attempt | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "High" was mapped to high in the OpenAI API reasoning efforttranscribed from textSource excerptOSWorld 2.1 (offline subset) — Accuracy vs. cost: "GPT-6 Luna · High: 42.3% $0.14" |
| OSWorld 2.1(offline subset)Xhigh | Xhigh | 44.8% | $0.17Cost per attempt | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Xhigh" was mapped to xhigh in the OpenAI API reasoning efforttranscribed from textSource excerptOSWorld 2.1 (offline subset) — Accuracy vs. cost: "GPT-6 Luna · Xhigh: 44.8% $0.17" |
| OSWorld 2.1(offline subset)Max | Max | 48.9% | $0.20Cost per attempt | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for a model from some other vendor (announced by Anthropic); the figure's effort label "Max" was mapped to max in the OpenAI API reasoning efforttranscribed from textSource excerptOSWorld 2.1 (offline subset) — Accuracy vs. cost: "GPT-6 Luna · Max: 48.9% $0.20" |
| Chartography (without tools)not stated | not stated | 29.1% | — | not stated | Introducing Claude Haiku 5.5official · Retrieved 2026-11-12 | Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); values for other vendor models (as listed by Anthropic)transcribed from tableSource excerpt29.1%Location Table, Chartography (no tools) row: 29.1 |
| HealthBench Professional (length-adjusted score)not stated | not stated | 60.8 | — | OpenAI | Addendum to GPT-6 Astra System Card: GPT-6.1 Terraofficial · Retrieved 2026-11-14 | Vendor-reported value. Self-reported by OpenAI. effort not stated. length-adjusted score. Parentheses contain the unadjusted score and mean response length in characters; only the leading value is used as score. Cost not stated.transcribed from tableSource excerpt60.8 (61.2, 2119)Location §5.1 Table 5, HealthBench Professional length-adjusted row, gpt-6-luna column |
| HealthBench Hard (length-adjusted score)not stated | not stated | 31.4 | — | OpenAI | Addendum to GPT-6 Astra System Card: GPT-6.1 Terraofficial · Retrieved 2026-11-14 | Vendor-reported value. Self-reported by OpenAI. effort not stated. length-adjusted score. Parentheses contain the unadjusted score and mean response length in characters; only the leading value is used as score. Cost not stated.transcribed from tableSource excerpt31.4 (25.4, 1241)Location §5.1 Table 5, HealthBench Hard length-adjusted row, gpt-6-luna column |
| GPQA DiamondMax | Max | 90.5% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptgpqa_diamond.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.9046717171717171, stderr=0.018537378631915503, Started at=2026-09-22T22:14:05.000Z |
| FrontierMath Tiers 1-3(v2)Max | Max | 79.0% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, frontiermath_tiers_1_3_v2.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptfrontiermath_tiers_1_3_v2.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.7894736842105263, stderr=0.024191503146153773, Started at=2026-09-22T22:14:05.000Z |
| FrontierMath Tier 4(v2)Max | Max | 56.1% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, frontiermath_tier_4_v2.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptfrontiermath_tier_4_v2.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.5609756097560976, stderr=0.07846686801046543, Started at=2026-09-22T22:14:05.000Z |
| OTIS Mock AIME 2024-2025Max | Max | 98.9% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, otis_mock_aime_2024_2025.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptotis_mock_aime_2024_2025.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.9888888888888889, stderr=0.006674027922425511, Started at=2026-09-22T22:14:05.000Z |
| SimpleQA VerifiedMax | Max | 41.4% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, simpleqa_verified.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptsimpleqa_verified.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.414, stderr=0.015583544104177553, Started at=2026-09-22T22:14:05.000Z |
| Chess Puzzles(Epoch AI)Max | Max | 36.0% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, chess_puzzles.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptchess_puzzles.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.36, stderr=0.04824181513244218, Started at=2026-10-13T13:37:06.000Z |
| MirrorCodeMax | Max | 26.7% | — | Epoch AI | Epoch AI, Capabilities & benchmarking (benchmark_data.zip, mirrorcode.csv) CC BY 4.0third-party · Retrieved 2026-11-12 | Run by Epoch AI (third-party measurement). Source label "GPT-6 Luna (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from tableSource excerptmirrorcode.csv: Model version=gpt-6-luna_max, Best score (across scorers)=0.26666666666666666, stderr=0.09026709338484401, Started at=2026-10-21T16:48:12.000Z |
| Epoch Capabilities Index(ECI)not stated | not stated | 156.41 | — | Epoch AI | Epoch AI, epoch_capabilities_index/eci_scores.csv (CC BY 4.0)third-party · Retrieved 2026-11-12 | A per-model metric that combines results across multiple benchmarks and multiple efforts (not per effort). Calculated by Epoch AI.transcribed from tableSource excerpteci_scores.csv: Model=GPT-6 Luna, eci=156.41, eci_ci_low=154.45, eci_ci_high=158.5 |
| LMArena Text (style control, overall)Max | Max | 1,441 | — | LMArena | lmarena-ai/leaderboard-dataset text_style_control/latest-00000-of-00001.parquet (CC BY 4.0)third-party · Retrieved 2026-11-12 | Human head-to-head votes (Bradley-Terry). Source label "GPT-6 Luna (Max)" (effort is in parentheses in the label). Release date 2026-11-09.transcribed from tableSource excerptmodel_name=GPT-6 Luna (Max), rating=1440.82, rating_lower=1436.7, rating_upper=1444.9, vote_count=107021, rank=98, category=overall, leaderboard_publish_date=2026-11-09 |
| LMArena Text Coding (without style control)Max | Max | 1,432 | — | LMArena | lmarena-ai/leaderboard-dataset text/latest-00000-of-00001.parquet (CC BY 4.0)third-party · Retrieved 2026-11-12 | Human head-to-head votes (Bradley-Terry). Source label "GPT-6 Luna (Max)" (effort is in parentheses in the label). Release date 2026-11-09.transcribed from tableSource excerptmodel_name=GPT-6 Luna (Max), rating=1432.04, rating_lower=1426.3, rating_upper=1437.8, vote_count=24606, rank=139, category=coding, leaderboard_publish_date=2026-11-09 |
Related rankings
- Overall ranking (performance first)
- Terminal-Bench 4.0 ranking by metric
- FrontierCode v1.1(main set) ranking by metric
- GDPval-AA v2.1 ranking by metric
- AA-Briefcase v1.1(Elo) ranking by metric
- OSWorld 2.1(offline subset) ranking by metric
- Chartography (without tools) ranking by metric
- HealthBench Professional (length-adjusted score) ranking by metric
- HealthBench Hard (length-adjusted score) ranking by metric
- GPQA Diamond ranking by metric
- FrontierMath Tiers 1-3(v2) ranking by metric
- FrontierMath Tier 4(v2) ranking by metric
- OTIS Mock AIME 2024-2025 ranking by metric
- SimpleQA Verified ranking by metric
- Chess Puzzles(Epoch AI) ranking by metric
- MirrorCode ranking by metric
- Epoch Capabilities Index(ECI) ranking by metric
- LMArena Text (style control, overall) ranking by metric
- LMArena Text Coding (without style control) ranking by metric
- Recommendations by role