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GPT-6.1 Terra vs GPT-6 Astra

Full profiles: GPT-6.1 Terra (OpenAI) and GPT-6 Astra (OpenAI): every benchmark, price and rank.

Updated · Data from 10 sources

As of 27 Oct 2026, GPT-6.1 Terra (max) and GPT-6 Astra (max) are neck and neck on quality (65.9 vs 70.3 on the BenchLeader Index, inside the ±7.9 margin of error), and GPT-6.1 Terra (max) costs 10× less, which makes it the better buy for most workloads. Pick GPT-6.1 Terra for reasoning (86 vs 76); pick GPT-6 Astra for knowledge (79 vs 75).

GPT-6.1 Terra benchmarks max OpenAI GPT-6 Astra benchmarks max OpenAIOpen in the comparison tool

Which to pick for…

The pick's numbers come first. Category scores on the BenchLeader scale (50 is the average model, 15 points one standard deviation). High confidence means a lead of half a standard deviation or more; under one point is called either.

Use casePickWhyConfidence
ReasoningGPT-6.1 Terra86 vs 76 category score; CritPt 28.0% vs 31.7%High
KnowledgeGPT-6 Astra79 vs 75 category score; AA-Omniscience 43.4 vs 29.8Medium
Long documentsGPT-6.1 Terra66 vs 65 category score; AA-LCR 82.7% vs 80.7%Medium
Images and other mediaGPT-6.1 Terra68 vs 66 category score; MMMU-Pro 84.7% vs 86.9%Medium
Chat quality (human preference)–Only GPT-6 Astra has an Arena rating (67 category score)Not comparable
Lowest costGPT-6.1 Terra$2.00 vs $20.00 per 1M blended; agentic coding session $0.080 vs $0.800–
Fastest first answerGPT-6.1 Terra131.8 s (GPT-6.1 Terra (max)) vs 353.2 s (GPT-6 Astra (max)) to the first answer token–
High volume on a budgetNeither flagshipA smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs–

Key differences

  • GPT-6.1 Terra (max) and GPT-6 Astra (max) are neck and neck on quality (65.9 vs 70.3, within the ±7.9 margin).
  • GPT-6.1 Terra (max) is stronger in long context, multimodal, reasoning.
  • GPT-6 Astra (max) is stronger in composite, knowledge, agents & tools, coding, human preference, maths.
  • GPT-6.1 Terra (max) is 10× cheaper ($2.00 vs $20.00 per 1M blended).
  • GPT-6.1 Terra (max) streams 1.3× faster (91 vs 68 tokens per second).

At a glance

SpecGPT-6.1 TerraGPT-6 Astra
DeveloperOpenAIOpenAI
Released26 Oct 20262 Sept 2026
Context window (tokens)1,050,0001,050,000
Compared atGPT-6.1 Terra (max)GPT-6 Astra (max)
Open weightsNoNo
Price in / out / cached input per 1M$1.00 / $5.00 / $0.050$10.00 / $50.00 / $1.00

Category by category

Category scores on the BenchLeader scale: 50 is the average evaluated model, 15 points is one standard deviation. A gap under one point is called level.

CategoryGPT-6.1 Terra (max)GPT-6 Astra (max)Leader
Reasoning86.276.1GPT-6.1 Terra
Coding–73.9not comparable
Agents & tools–64.2not comparable
Maths–71.8not comparable
Knowledge74.579.3GPT-6 Astra
Human preference–66.7not comparable
Multimodal67.565.9GPT-6.1 Terra
Long context66.365.2GPT-6.1 Terra
Composite82.887.8GPT-6 Astra

Where sources disagree

Across the 14 benchmarks both have, GPT-6.1 Terra leads 2, GPT-6 Astra leads 12. Every overall index that rates both puts GPT-6 Astra ahead.

Overall indexGPT-6.1 Terra (max)GPT-6 Astra (max)Leader
BenchLeader Index65.970.3neck and neck
AA Intelligence Index v4.3.248.152.7GPT-6 Astra

Each publisher runs its own tasks, harnesses and effort settings, so their overall verdicts can differ; BenchLeader reconciles them on one scale. † measured at another effort setting of the same model (the publisher did not test the one compared here).

Price, speed and latency

List prices blended at three input tokens per output token. Per-task prices use the token counts on the methodology page; suite cost is what Artificial Analysis paid to run its whole Intelligence Index.

MeasureGPT-6.1 Terra (max)GPT-6 Astra (max)
Blended price per 1M tokens$2.00$20.00
Input / output per 1M$1.00 / $5.00$10.00 / $50.00
Cached input per 1M$0.050$1.00
Price per task: chat reply$0.0019$0.019
Price per task: summarize a 30-page report$0.015$0.150
Price per task: code edit$0.013$0.135
Price per task: agentic coding session$0.080$0.800
Price per task: structured extraction$0.0030$0.030
Cost to run a full benchmark suite$0.403$3.26
Output speed91 tok/s68 tok/s
Time to first answer131.8 s353.2 s
Time to a complete answer137.3 s360.5 s

Per token is not per task: on Artificial Analysis' full suite GPT-6.1 Terra (max) cost $0.403 and GPT-6 Astra (max) $3.26, because GPT-6.1 Terra (max) used about 1.2× as many tokens for the same work.

Each model is compared at its best-ranked reasoning-effort setting. GPT-6.1 Terra (max) scores 65.9 and takes 132 s to its first answer token; GPT-6.1 Terra (xhigh) scores 65.0 in 18 s, GPT-6.1 Terra (high) scores 64.7 in 7 s. GPT-6 Astra (max) scores 70.3 and takes 353 s to its first answer token; GPT-6 Astra (high) scores 69.5 in 62 s, GPT-6 Astra (xhigh) scores 68.8 in 175 s. Higher effort means more thinking before the answer: better scores, longer waits and more tokens billed. How reasoning effort changes scores and cost.

Every benchmark

132 benchmarks, grouped by category; each name links to the board and its leaders. † measured at another effort setting of the same model, shown for reference and not counted as a win.

MetricPublisherGPT-6.1 Terra (max)GPT-6 Astra (max)
BenchLeader IndexBenchLeader65.970.3
Composite scoreBenchLeader82.887.8
Knowledge scoreBenchLeader74.579.3
Long context scoreBenchLeader66.365.2
Multimodal scoreBenchLeader67.565.9
Reasoning scoreBenchLeader86.276.1
Agents & tools scoreBenchLeader–64.2
Coding scoreBenchLeader–73.9
Human preference scoreBenchLeader–66.7
Maths scoreBenchLeader–71.8
Blended price $/MBenchLeader$2.00$20.00
Output speedBenchLeader91 tok/s68 tok/s
Time to first answerBenchLeader131.8 s353.2 s
Context windowBenchLeader1,050,000 tokens1,050,000 tokens
Reasoning
GPQA DiamondEpoch AI Benchmarking Hub–95.8%
Humanity's Last ExamScale AI / CAIS–54.8%†
Arena Hard PromptsArena (LMArena)–1501
LiveBench 2.0 ReasoningLiveBench88.7%†92.7%†
LiveBench 1.0 ReasoningLiveBench–92.7%
GPQA Diamond (AA)Artificial Analysis–96.1%
Humanity's Last Exam (AA)Artificial Analysis46.3%54.7%
ARC-AGI-1ARC Prize–97.5%
ARC-AGI-2ARC Prize–95.0%
ARC-AGI-3ARC Prize–98.6%
CritPtArtificial Analysis28.0%31.7%
MysteryMechanismVals AI–53.1%
Chess PuzzlesEpoch AI Benchmarking Hub–74.0%
Mystery Game PuzzlesEpoch AI Benchmarking Hub–84.0%
LMCAEpoch AI Benchmarking Hub–64.1%†
DTBenchEpoch AI Benchmarking Hub–97.1%†
BTF-3Epoch AI Benchmarking Hub–13.5%†
Coding
SciCodeSciCode–56.5%
WeirdMLWeirdML–93.3%
FrontierCodeCognition–53.3%
GSO-BenchGSO-Bench–79.4%†
Arena CodingArena (LMArena)–1543
Arena WebDevArena (LMArena)–1774
LiveBench 2.0 CodingLiveBench90.8%†93.7%†
LiveBench 1.0 CodingLiveBench–80.4%
Show all 132 benchmarks
MetricPublisherGPT-6.1 Terra (max)GPT-6 Astra (max)
Coding
SciCode (AA)Artificial Analysis55.1%56.5%
IOIVals AI–100.0%
Code MigrationVals AI–67.7%
Code Migration v1.1Vals AI–80.6%
ProgramBenchVals AI–5.5%
SWE-bench MultimodalVals AI–43.3%
Vibe Code Bench 1-100Vals AI–27.6%
Vibe Code Bench v1.1Vals AI–89.6%
SWE Atlas: Codebase QnAScale AI SEAL–59.1%†
SWE Atlas: RefactoringScale AI SEAL–59.0%†
SWE Atlas: Test WritingScale AI SEAL–50.7%†
MirrorCodeEpoch AI Benchmarking Hub–46.7%†
DeepSWE v1.1Epoch AI Benchmarking Hub–73.2%
ALE-BenchEpoch AI Benchmarking Hub–2951.3
FrontierSWEEpoch AI Benchmarking Hub–65.5%
Terminal-Bench 4.0 (AA)Artificial Analysis55.6%59.1%
Terminal-Bench 2.1 (AA)Artificial Analysis–88.4%
Startrise FrontendStartrise–79.9%†
FrontierCode 1.1 (AA)Artificial Analysis36.0%47.0%
Agents & tools
Terminal-BenchTerminal-Bench–58.2%
Remote Labor IndexScale AI / CAIS–20.8%†
APEX-AgentsMercor–64.7%†
Arena AgentArena (LMArena)–14
LiveBench Long AgenticLiveBench48.6%†77.5%†
LiveBench BrowserLiveBench93.1%†91.3%†
LiveBench Agentic CodingLiveBench–57.3%
Terminal-Bench 2.1 (Vals)Vals AI–87.3%
HiL-BenchScale AI SEAL–65.3%†
GDPval-AA v2.1Artificial Analysis–53.7%
τ³-Banking (AA)Artificial Analysis–41.4%
ITBench SRE (AA)Artificial Analysis–48.6%
Analyst Agent (AA)Artificial Analysis–51.3%
CUA-benchVals AI–19.2%
CyberBenchVals AI–41.1%
Finance Agent v2Vals AI–53.5%
Finance Agent v2.1Vals AI–60.4%
Harvey's Legal Agent Benchmark v1.1Vals AI–7.1%
Harvey's Legal Agent Benchmark v1Vals AI–5.4%
Legal Research BenchVals AI–39.4%
Robo-benchVals AI–23.3%
SREBenchVals AI–56.9%
Tax Agent BenchVals AI–20.7%
Terminal-Bench 4.0 (Vals)Vals AI–59.6%
Terminal-Bench ScienceVals AI–62.9%
Time Horizon Index: KSPVals AI–90.5%
Arena SearchArena (LMArena)–1246
BALROGBALROG–68.3%
Vending-Bench 2Andon Labs–15514.7†
AutomationBenchArtificial Analysis60.2%68.5%
GDP.pdf (AA)Artificial Analysis28.6%31.0%
Harvey LAB-AA v1.1Harvey–8.6%
AA-Briefcase v1.1Artificial Analysis14021568
Terminal-Bench-Science 0.1 (AA)Artificial Analysis57.6%63.3%
CWE-Bench (AA)Artificial Analysis–63.3%
DeepSec-Bench (AA)Artificial Analysis–36.9%
CyberGym end-to-end (AA)Artificial Analysis–0.0%
FACTS SearchGoogle–89.9%†
Maths
FrontierMath Tiers 1–3Epoch AI Benchmarking Hub–93.7%
FrontierMath Tier 4Epoch AI Benchmarking Hub–97.6%
OTIS Mock AIMEEpoch AI Benchmarking Hub–100.0%
ProofBenchVals AI–99.0%†
LiveBench MathematicsLiveBench–96.8%
Arena MathsArena (LMArena)–1487
Knowledge
SimpleQA VerifiedEpoch AI Benchmarking Hub–75.6%
LiveBench 2.0 Data AnalysisLiveBench82.3%†83.0%†
LiveBench ResearchLiveBench73.9%†85.2%†
LiveBench 1.0 Data AnalysisLiveBench–83.0%
AA-OmniscienceArtificial Analysis29.843.4
PRBench FinanceScale AI SEAL–47.5%†
PRBench LegalScale AI SEAL–48.4%†
BioMysteryBenchVals AI–79.3%
Excel Modeling BenchmarkVals AI–71.7%
Excel Modeling Benchmark v1.1Vals AI–72.7%
MedCodeVals AI–48.5%
MedScribeVals AI–87.9%
DrugDiscoveryBenchScale AI SEAL–68.7%
EBR-benchEpoch AI Benchmarking Hub–76.2%
GDP.pdfEpoch AI Benchmarking Hub–34.2%
AA-Omniscience: accuracyArtificial Analysis49.1%62.6%
AA-Omniscience: non-hallucinationArtificial Analysis62.0%48.7%
Instruction following
LiveBench LanguageLiveBench–89.4%
LiveBench Instruction FollowingLiveBench–75.6%
Arena Instruction FollowingArena (LMArena)–1473
Human preference
Arena TextArena (LMArena)–1477
Arena Creative WritingArena (LMArena)–1450
Arena Multi-turnArena (LMArena)–1485
Arena Longer QueriesArena (LMArena)–1489
Multimodal
Arena VisionArena (LMArena)–1280
LiveBench DesignLiveBench82.3%†82.0%†
MMMU-ProArtificial Analysis84.7%86.9%
SAGEVals AI–46.4%
Blueprint-Bench 2Epoch AI Benchmarking Hub–49.7%†
AA-3DArtificial Analysis–1164
Long context
AA-LCRArtificial Analysis82.7%80.7%
Arena DocumentArena (LMArena)–1473
MLCRArtificial Analysis–41.7%
Composite
Epoch Capabilities IndexEpoch AI Benchmarking Hub–168.8†
LiveBench 2.0LiveBench77.2%†85.6%†
LiveBench 1.0LiveBench–82.2%
AA Intelligence Index v4.3.2Artificial Analysis48.152.7
Vals IndexVals AI–65.0
Vals Finance IndexVals AI–55.6%
Vals RSI IndexVals AI–27.1%
Vals Science IndexVals AI–65.1%
Vals Router IndexVals AI–65.0%†
AA Cyber IndexArtificial Analysis–33.4
Safety & honesty
FORTRESSScale AI SEAL18.2%†–

Data as of 2026-10-27. Best configuration of each model; every score links to its source on the model pages.

What changed

  • GPT-6 Astra (max): 1 score revision.
  • GPT-6 Astra (max): 9 new results (Code Migration v1.1, Excel Modeling Benchmark v1.1, Finance Agent v2.1…).
  • GPT-6 Astra (max): 1 score revision.
  • GPT-6 Astra (max): 4 score revisions.
  • GPT-6 Astra (max): BenchLeader Index 69.8 → 70.6.
  • GPT-6 Astra (max): 1 score revision.
  • GPT-6 Astra (max): 1 new result (Arena Search); 3 score revisions.
  • GPT-6 Astra (max): BenchLeader Index 70.3 → 69.8.
  • GPT-6 Astra (max): 1 score revision.
  • GPT-6 Astra (max): 7 new results (FrontierCode 1.1 (AA), Terminal-Bench-Science 0.1 (AA), AA Cyber Index…); 1 score revision.

Rankings: Best LLM overall · Best LLM for coding · Best LLM for agents · Best cheap LLMs

GPT-6.1 Terra vs GPT-6 Astra: questions

Is GPT-6.1 Terra better than GPT-6 Astra?
GPT-6.1 Terra (max) and GPT-6 Astra (max) are neck and neck on quality (65.9 vs 70.3, within the ±7.9 margin). The BenchLeader Index combines every independent quality benchmark; the two are within the margin of error as of 2026-10-27, so check the category scores for your use.
Which is cheaper, GPT-6.1 Terra or GPT-6 Astra, and will that change?
GPT-6.1 Terra is cheaper today: $2.00 against $20.00 per million tokens, blended at three input tokens per output token. No price change has been announced for either.
Which is better for long documents?
GPT-6.1 Terra scores higher on long-context benchmarks (66 vs 65). Both accept 1,050,000 tokens of context.
Which has lower latency?
GPT-6.1 Terra (max) answers first: 131.8 s against 353.2 s to the first answer token, as Artificial Analysis measures it. Reasoning effort drives most of this: a higher setting thinks longer before it answers.
Which is faster, GPT-6.1 Terra or GPT-6 Astra?
GPT-6.1 Terra streams faster: 91 against 68 output tokens per second.
Do independent benchmarks agree on GPT-6.1 Terra vs GPT-6 Astra?
Across the 14 benchmarks both have, GPT-6.1 Terra leads 2, GPT-6 Astra leads 12. Every overall index that rates both puts GPT-6 Astra ahead.
When was GPT-6.1 Terra released?
GPT-6.1 Terra was released on 26 Oct 2026.