vs
0:11
overall capability wins (0 ties across 11 scored). Grok 4.5 leads overall.
- Reasoning0:6
- Coding0:2
- Arena0:1
- Pricing0:3
- Speed0:2
- Specs0:2
Verdict
Grok 4.5 leads coding (widest gap: +25.5 on SWE-Rebench); Grok 4.5 ranks higher on LMArena (+57 Elo); Grok 4.5 offers ~2.0x larger context (500K vs 256K).
- Grok 4.5 leads coding (widest gap: +25.5 on SWE-Rebench)
- Grok 4.5 ranks higher on LMArena (+57 Elo)
- Grok 4.5 offers ~2.0x larger context (500K vs 256K)
- Grok 4.5 allows ~2.0x more max output (128K vs 64K)
- Grok 4.5 is ~2.0x cheaper on a blended token basis than Grok 4
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Grok 4
- $6.75
- Grok 4.5
- $3.50
Grok 4.5 is about 1.9x cheaper on this workload.
Price per 1M tokens
Full comparison
Organization
xAI
xAI
Family
Grok
Grok
License
Proprietary
Proprietary
Open weights
No
No
Release
Jul 9, 2025
Jul 9, 2026
Knowledge cutoff
-
-
API / provider
xAI
xAI
Modalities
text, image → text
text, image → text
Specs
Context window
256K
500K
Max output
64K
128K
Parameters
—
—
Pricing
Input $/1M
$3
$2
Output $/1M
$15
$6
Blended $/1M (3∶1)
$6
$3
Speed
tok/s
70
100
TTFT (s)
0.5
0.35
Reasoning
MMLU-Pro
86.6
—
GPQA Diamond
87.7
93.1
Humanity's Last Exam
26.7
42.7
AIME 2025
92.7
—
MATH-500
99.0
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
40.5
51.6
AA-LCR v1.1
68.0
79.3
CritPt
2.0
15.4
MMMU-Pro
68.8
80.4
IFBench
53.7
—
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
81.9
—
Terminal-Bench 2.1
—
81.6
Aider Polyglot
79.6
—
Terminal-Bench 3
—
15.7
BigCodeBench
—
—
SciCode
45.7
55.0
CursorBench
—
—
SWE-Rebench
38.3
63.8
NL2Repo-Bench
—
—
DeepSWE
—
—
WebDev Arena
—
1,555
Terminal-Bench 4.0
—
12.4
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,411
1,468
| Metric | Grok 4 | Grok 4.5 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | xAI | xAI | — |
| Family | Grok | Grok | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | Jul 9, 2025 | Jul 9, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | xAI | xAI | — |
| Modalities | text, image → text | text, image → text | — |
| Specs | |||
| Context window | 256K | 500K | B +244K |
| Max output | 64K | 128K | B +64K |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $3 | $2 | B +$1 |
| Output $/1M | $15 | $6 | B +$9 |
| Blended $/1M (3∶1) | $6 | $3 | B +$3 |
| Speed | |||
| tok/s | 70 | 100 | B +30 |
| TTFT (s) | 0.5 | 0.35 | B +0.15 |
| Reasoning | |||
| MMLU-Pro | 86.6 | — | — |
| GPQA Diamond | 87.7 | 93.1 | B +5.4 pts |
| Humanity's Last Exam | 26.7 | 42.7 | B +16.0 pts |
| AIME 2025 | 92.7 | — | — |
| MATH-500 | 99.0 | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | 40.5 | 51.6 | B +11.1 pts |
| AA-LCR v1.1 | 68.0 | 79.3 | B +11.3 pts |
| CritPt | 2.0 | 15.4 | B +13.4 pts |
| MMMU-Pro | 68.8 | 80.4 | B +11.6 pts |
| IFBench | 53.7 | — | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | 81.9 | — | — |
| Terminal-Bench 2.1 | — | 81.6 | — |
| Aider Polyglot | 79.6 | — | — |
| Terminal-Bench 3 | — | 15.7 | — |
| BigCodeBench | — | — | — |
| SciCode | 45.7 | 55.0 | B +9.3 pts |
| CursorBench | — | — | — |
| SWE-Rebench | 38.3 | 63.8 | B +25.5 pts |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | — | — |
| WebDev Arena | — | 1,555 | — |
| Terminal-Bench 4.0 | — | 12.4 | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,411 | 1,468 | B +57 Elo |
Grok 4
- Context
- 256K / 64K out
- Parameters
- —
- Price
- $3 / $15
- Speed
- 70 tok/s · 0.5s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Original Grok 4 flagship from mid-2025 with strong STEM scores for its generation.
Grok 4.5
- Context
- 500K / 128K out
- Parameters
- —
- Price
- $2 / $6
- Speed
- 100 tok/s · 0.35s TTFT
- Modalities
- text, image → text
- License
- Proprietary
xAI/SpaceXAI public API flagship (July 2026) - Cursor-trained coding focus at $2/$6. For the Cursor IDE jointly-trained SKU and Fast tier, see Cursor Grok 4.5.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.