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GPT-6 Astra vs Grok 4.6

Full profiles: GPT-6 Astra (OpenAI) and Grok 4.6 (SpaceXAI): every benchmark, price and rank.

Updated · Data from 10 sources

As of 24 Oct 2026, GPT-6 Astra (max) leads on quality (70.4 vs 64.2 on the BenchLeader Index), but Grok 4.6 (medium) costs 6.7× less, so it is the better buy unless you need the extra quality. Pick GPT-6 Astra for reasoning (76 vs 64); pick Grok 4.6 for agents & tools (74 vs 64).

GPT-6 Astra benchmarks max OpenAI Grok 4.6 benchmarks medium SpaceXAIOpen 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
CodingGPT-6 Astra74 vs 62 category score; SciCode 56.5% vs 55.9%High
Agents & tool useGrok 4.674 vs 64 category score; τ³-Banking (AA) 44.3% vs 41.4%High
ReasoningGPT-6 Astra76 vs 64 category score; ARC-AGI-2 95.0% vs 61.3%High
KnowledgeGPT-6 Astra80 vs 74 category score; AA-Omniscience 43.4 vs 28Medium
Long documentsEither65 vs 66 category score; AA-LCR 80.7% vs 81.0%Either
Chat quality (human preference)–Only GPT-6 Astra has an Arena rating (67 category score)Not comparable
Lowest costGrok 4.6$3.00 vs $20.00 per 1M blended; agentic coding session $0.144 vs $0.800–
Fastest first answerGrok 4.625.5 s (Grok 4.6 (medium)) vs 247.0 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 Astra (max) leads on quality: 70.4 vs 64.2.
  • GPT-6 Astra (max) is stronger in coding, composite, human preference, knowledge, maths, multimodal, reasoning.
  • Grok 4.6 (medium) is stronger in agents & tools, long context.
  • Grok 4.6 (medium) is 6.7× cheaper ($3.00 vs $20.00 per 1M blended).
  • Grok 4.6 (medium) streams 1.4× faster (84 vs 58 tokens per second).

At a glance

SpecGPT-6 AstraGrok 4.6
DeveloperOpenAISpaceXAI
Released2 Sept 202611 Aug 2026
Context window (tokens)1,050,000500,000
Compared atGPT-6 Astra (max)Grok 4.6 (medium)
Open weightsNoNo
Price in / out / cached input per 1M$10.00 / $50.00 / $1.00$2.00 / $6.00 / $0.500

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 Astra (max)Grok 4.6 (medium)Leader
Reasoning76.264.4GPT-6 Astra
Coding74.062.3GPT-6 Astra
Agents & tools64.273.5Grok 4.6
Maths71.8–not comparable
Knowledge79.574.1GPT-6 Astra
Human preference66.7–not comparable
Multimodal66.0–not comparable
Long context65.465.6level
Composite88.477.4GPT-6 Astra

Where sources disagree

Across the 17 benchmarks both have, GPT-6 Astra leads 14, Grok 4.6 leads 3. Every overall index that rates both puts GPT-6 Astra ahead.

Overall indexGPT-6 Astra (max)Grok 4.6 (medium)Leader
BenchLeader Index70.464.2GPT-6 Astra
AA Intelligence Index v4.3.252.742.8GPT-6 Astra
Arena Text14771456†GPT-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 Astra (max)Grok 4.6 (medium)
Blended price per 1M tokens$20.00$3.00
Input / output per 1M$10.00 / $50.00$2.00 / $6.00
Cached input per 1M$1.00$0.500
Price per task: chat reply$0.019$0.0026
Price per task: summarize a 30-page report$0.150$0.028
Price per task: code edit$0.135$0.021
Price per task: agentic coding session$0.800$0.144
Price per task: structured extraction$0.030$0.0052
Cost to run a full benchmark suite$3.26$1.14
Output speed58 tok/s84 tok/s
Time to first answer247.0 s25.5 s
Time to a complete answer255.6 s31.4 s

Per token is not per task: on Artificial Analysis' full suite GPT-6 Astra (max) cost $3.26 and Grok 4.6 (medium) $1.14, because Grok 4.6 (medium) used about 2.3× as many tokens for the same work, which a per-token price hides.

Each model is compared at its best-ranked reasoning-effort setting. GPT-6 Astra (max) scores 70.4 and takes 247 s to its first answer token; GPT-6 Astra (high) scores 69.6 in 35 s, GPT-6 Astra (xhigh) scores 68.9 in 130 s. Grok 4.6 (medium) scores 64.2 and takes 25 s to its first answer token; Grok 4.6 (high) scores 62.9 in 25 s, Grok 4.6 (xhigh) scores 62.5 in 28 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

144 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 Astra (max)Grok 4.6 (medium)
BenchLeader IndexBenchLeader70.464.2
Agents & tools scoreBenchLeader64.273.5
Coding scoreBenchLeader74.062.3
Composite scoreBenchLeader88.477.4
Human preference scoreBenchLeader66.7–
Knowledge scoreBenchLeader79.574.1
Long context scoreBenchLeader65.465.6
Maths scoreBenchLeader71.8–
Multimodal scoreBenchLeader66.0–
Reasoning scoreBenchLeader76.264.4
Blended price $/MBenchLeader$20.00$3.00
Output speedBenchLeader58 tok/s84 tok/s
Time to first answerBenchLeader247.0 s25.5 s
Context windowBenchLeader1,050,000 tokens500,000 tokens
Reasoning
GPQA DiamondEpoch AI Benchmarking Hub95.8%94.0%†
Humanity's Last ExamScale AI / CAIS54.8%†–
SimpleBenchSimpleBench–75.9%†
Arena Hard PromptsArena (LMArena)15011482†
LiveBench 2.0 ReasoningLiveBench92.7%†91.2%†
LiveBench 1.0 ReasoningLiveBench92.7%90.5%†
GPQA Diamond (AA)Artificial Analysis96.1%93.5%
Humanity's Last Exam (AA)Artificial Analysis54.7%42.1%
GPQA Diamond (Vals)Vals AI–94.7%†
ARC-AGI-1ARC Prize97.5%87.5%
ARC-AGI-2ARC Prize95.0%61.3%
ARC-AGI-3ARC Prize98.6%2.1%†
CritPtArtificial Analysis31.7%17.7%
MysteryMechanismVals AI53.1%30.6%†
Chess PuzzlesEpoch AI Benchmarking Hub74.0%33.0%†
Mystery Game PuzzlesEpoch AI Benchmarking Hub84.0%34.0%†
LMCAEpoch AI Benchmarking Hub64.1%†48.5%†
DTBenchEpoch AI Benchmarking Hub97.1%†97.3%†
ForecastBenchForecastBench–65.5%†
BTF-3Epoch AI Benchmarking Hub13.5%†–
Coding
SciCodeSciCode56.5%55.9%
WeirdMLWeirdML93.3%67.3%†
FrontierCodeCognition53.3%48.0%†
GSO-BenchGSO-Bench79.4%†–
Arena CodingArena (LMArena)15431510†
Show all 144 benchmarks
MetricPublisherGPT-6 Astra (max)Grok 4.6 (medium)
Coding
Arena WebDevArena (LMArena)17751617†
LiveBench 2.0 CodingLiveBench93.7%†89.1%†
LiveBench 1.0 CodingLiveBench80.4%76.8%†
LiveCodeBenchVals AI–88.2%†
IOIVals AI100.0%47.6%†
SWE-bench (Vals)Vals AI–95.6%†
Code MigrationVals AI67.7%44.6%†
Code Migration v1.1Vals AI80.6%–
ProgramBenchVals AI5.5%1.0%†
SWE-bench MultimodalVals AI43.3%–
Vibe Code Bench 1-100Vals AI27.6%14.8%†
Vibe Code Bench v1.1Vals AI89.6%76.2%†
SWE Atlas: Codebase QnAScale AI SEAL59.1%†–
SWE Atlas: RefactoringScale AI SEAL59.0%†–
SWE Atlas: Test WritingScale AI SEAL50.7%†–
MirrorCodeEpoch AI Benchmarking Hub46.7%†–
DeepSWE v1.1Epoch AI Benchmarking Hub73.2%67.5%
CursorBenchCursor–36.1%
ALE-BenchEpoch AI Benchmarking Hub2951.31508.1†
FrontierSWEEpoch AI Benchmarking Hub65.5%25.3%†
Terminal-Bench 4.0 (AA)Artificial Analysis59.1%13.1%
Terminal-Bench 2.1 (AA)Artificial Analysis88.4%84.3%
Startrise FrontendStartrise79.9%†72.1%†
FrontierCode 1.1 (AA)Artificial Analysis47.0%–
Agents & tools
Terminal-BenchTerminal-Bench58.2%20.3%†
Remote Labor IndexScale AI / CAIS20.8%†–
APEX-AgentsMercor64.7%†65.3%†
Arena AgentArena (LMArena)14.70.7†
LiveBench Long AgenticLiveBench82.4%†40.7%†
LiveBench BrowserLiveBench84.0%†64.0%†
LiveBench Agentic CodingLiveBench57.3%57.0%†
Terminal-Bench 2.1 (Vals)Vals AI87.3%78.3%†
HiL-BenchScale AI SEAL65.3%†–
GDPval-AA v2.1Artificial Analysis53.7%–
τ³-Banking (AA)Artificial Analysis41.4%44.3%
ITBench SRE (AA)Artificial Analysis48.6%–
Analyst Agent (AA)Artificial Analysis51.3%41.3%†
CUA-benchVals AI19.2%–
CyberBenchVals AI41.1%67.7%†
Finance Agent v2Vals AI53.5%53.7%†
Finance Agent v2.1Vals AI60.4%–
Harvey's Legal Agent Benchmark v1.1Vals AI7.1%–
Harvey's Legal Agent Benchmark v1Vals AI5.4%15.8%†
Legal Research BenchVals AI39.4%48.1%†
Robo-benchVals AI23.3%–
SkillsBenchVals AI–55.8%†
SREBenchVals AI56.9%–
Tax Agent BenchVals AI20.7%33.1%†
Terminal-Bench 4.0 (Vals)Vals AI59.6%17.2%†
Terminal-Bench ScienceVals AI62.9%11.4%†
Time Horizon Index: KSPVals AI90.5%5.8%†
Arena SearchArena (LMArena)1246–
BALROGBALROG68.3%–
Vending-Bench 2Andon Labs15514.7†9047.0†
AutomationBenchArtificial Analysis68.5%63.1%
GDP.pdf (AA)Artificial Analysis31.0%17.8%
Harvey LAB-AA v1.1Harvey8.6%–
EnterpriseOps-GymArtificial Analysis–48.3%†
AA-Briefcase v1.1Artificial Analysis15681531†
Terminal-Bench-Science 0.1 (AA)Artificial Analysis63.3%6.2%†
CWE-Bench (AA)Artificial Analysis63.3%–
DeepSec-Bench (AA)Artificial Analysis36.9%–
CyberGym end-to-end (AA)Artificial Analysis0.0%–
FACTS SearchGoogle89.9%†–
Maths
FrontierMath Tiers 1–3Epoch AI Benchmarking Hub93.7%66.0%†
FrontierMath Tier 4Epoch AI Benchmarking Hub97.6%31.7%†
OTIS Mock AIMEEpoch AI Benchmarking Hub100.0%97.8%†
ProofBenchVals AI99.0%†51.0%†
LiveBench MathematicsLiveBench96.8%92.6%†
Arena MathsArena (LMArena)14871445†
Knowledge
SimpleQA VerifiedEpoch AI Benchmarking Hub75.6%49.3%†
LiveBench 2.0 Data AnalysisLiveBench83.0%†75.3%†
LiveBench ResearchLiveBench85.2%†84.5%†
LiveBench 1.0 Data AnalysisLiveBench83.0%73.9%†
AA-OmniscienceArtificial Analysis43.428
MMLU-ProVals AI–89.4%†
LegalBenchVals AI–86.3%†
CorpFinVals AI–66.2%†
TaxEvalVals AI–71.1%†
PRBench FinanceScale AI SEAL47.5%†–
PRBench LegalScale AI SEAL48.4%†–
BioMysteryBenchVals AI79.3%72.2%†
Excel Modeling BenchmarkVals AI71.7%62.7%†
Excel Modeling Benchmark v1.1Vals AI72.7%–
MedCodeVals AI48.5%44.7%†
MedScribeVals AI87.9%86.5%†
Public Benefits Bench v1.1Vals AI–66.8%†
DrugDiscoveryBenchScale AI SEAL68.7%–
EBR-benchEpoch AI Benchmarking Hub76.2%30.5%†
GDP.pdfEpoch AI Benchmarking Hub34.2%16.0%†
AA-Omniscience: accuracyArtificial Analysis62.6%41.9%
AA-Omniscience: non-hallucinationArtificial Analysis48.7%76.0%
Instruction following
LiveBench LanguageLiveBench89.4%83.7%†
LiveBench Instruction FollowingLiveBench75.6%71.9%†
Arena Instruction FollowingArena (LMArena)14731452†
Human preference
Arena TextArena (LMArena)14771456†
Arena Creative WritingArena (LMArena)14501443†
Arena Multi-turnArena (LMArena)14851448†
Arena Longer QueriesArena (LMArena)14891475†
Multimodal
Arena VisionArena (LMArena)12801263†
LiveBench DesignLiveBench82.0%†79.8%†
MMMU-ProArtificial Analysis86.9%–
MortgageTaxVals AI–64.2%†
SAGEVals AI46.4%28.9%†
Blueprint-Bench 2Epoch AI Benchmarking Hub49.7%†33.2%†
AA-3DArtificial Analysis1166–
Long context
AA-LCRArtificial Analysis80.7%81.0%
Arena DocumentArena (LMArena)14731461†
MLCRArtificial Analysis41.7%18.3%
Composite
Epoch Capabilities IndexEpoch AI Benchmarking Hub168.8†156.6†
LiveBench 2.0LiveBench86.1%†74.9%†
LiveBench 1.0LiveBench82.2%78.0%†
AA Intelligence Index v4.3.2Artificial Analysis52.742.8
Vals IndexVals AI65.0–
Vals Finance IndexVals AI55.6%–
Vals RSI IndexVals AI27.1%25.5%†
Vals Science IndexVals AI65.1%38.1%†
Vals Router IndexVals AI65.0%†–
AA Cyber IndexArtificial Analysis33.4–

Data as of 2026-10-24. Best configuration of each model; every score links to its source on the model pages.

What changed

  • 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.
  • Grok 4.6 (medium): 1 new result (MLCR).
  • GPT-6 Astra (max): 4 score revisions.
  • GPT-6 Astra (max): BenchLeader Index 69.8 → 70.6.
  • Grok 4.6 (medium): 15 new results (AA Intelligence Index v4.3.2, GPQA Diamond (AA), Humanity's Last Exam (AA)…).
  • GPT-6 Astra (max): 1 score revision.
  • GPT-6 Astra (max): 1 new result (Arena Search); 3 score revisions.
  • Grok 4.6 (medium): 1 score revision.
  • GPT-6 Astra (max): BenchLeader Index 70.3 → 69.8.

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

GPT-6 Astra vs Grok 4.6: questions

Is GPT-6 Astra better than Grok 4.6?
GPT-6 Astra (max) leads on quality: 70.4 vs 64.2. The BenchLeader Index combines every independent quality benchmark; GPT-6 Astra (max) is ahead overall as of 2026-10-24, but check the category scores for your use.
Which is cheaper, GPT-6 Astra or Grok 4.6, and will that change?
Grok 4.6 is cheaper today: $3.00 against $20.00 per million tokens, blended at three input tokens per output token. No price change has been announced for either.
Is GPT-6 Astra better than Grok 4.6 for coding?
GPT-6 Astra scores higher in coding (74 vs 62 on the category index, where 50 is average). On SciCode, the top shared coding benchmark, it is 56.5% for GPT-6 Astra against 55.9% for Grok 4.6.
Is GPT-6 Astra better than Grok 4.6 for agents and tool use?
Grok 4.6 scores higher in agentic tasks (74 vs 64 on the category index, where 50 is average). On τ³-Banking (AA), the top shared agents & tools benchmark, it is 41.4% for GPT-6 Astra against 44.3% for Grok 4.6.
Which is better for long documents?
They are level on long-context benchmarks (65 vs 66). GPT-6 Astra accepts more context: 1,050,000 against 500,000 tokens for Grok 4.6.
Which has lower latency?
Grok 4.6 (medium) answers first: 25.5 s against 247.0 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 Astra or Grok 4.6?
Grok 4.6 streams faster: 84 against 58 output tokens per second.
Do independent benchmarks agree on GPT-6 Astra vs Grok 4.6?
Across the 17 benchmarks both have, GPT-6 Astra leads 14, Grok 4.6 leads 3. Every overall index that rates both puts GPT-6 Astra ahead.
When was GPT-6 Astra released?
GPT-6 Astra was released on 2 Sept 2026.