vs
0:1
overall capability wins (1 ties across 2 scored). Grok 4.3 leads overall.
- Speed0:2
- Specs0:1
Verdict
Grok 4.3 allows ~2.0x more max output (128K vs 64K).
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Grok 4.20
- $1.88
- Grok 4.3
- $1.88
Price per 1M tokens
Full comparison
Organization
xAI
xAI
Family
Grok
Grok
License
Proprietary
Proprietary
Open weights
No
No
Release
May 20, 2026
Jun 15, 2026
Knowledge cutoff
-
2026-02-01
API / provider
xAI
xAI
Modalities
text, image → text
text, image → text
Specs
Context window
1M
1M
Max output
64K
128K
Parameters
—
—
Pricing
Input $/1M
$1.25
$1.25
Output $/1M
$2.50
$2.50
Blended $/1M (3∶1)
$1.56
$1.56
Speed
tok/s
83
110
TTFT (s)
0.4
0.3
Reasoning
MMLU-Pro
—
—
GPQA Diamond
—
90.1
Humanity's Last Exam
—
37.2
AIME 2025
—
—
MATH-500
—
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
—
34.8
AA-LCR v1.1
—
73.0
CritPt
—
8.0
MMMU-Pro
—
78.1
IFBench
—
81.3
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
—
—
Terminal-Bench 2.1
—
39.7
Aider Polyglot
—
—
Terminal-Bench 3
—
—
BigCodeBench
—
—
SciCode
—
48.3
CursorBench
—
—
SWE-Rebench
—
—
NL2Repo-Bench
—
—
DeepSWE
—
—
WebDev Arena
—
1,357
Terminal-Bench 4.0
—
—
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
—
1,443
| Metric | Grok 4.20 | Grok 4.3 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | xAI | xAI | — |
| Family | Grok | Grok | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | May 20, 2026 | Jun 15, 2026 | — |
| Knowledge cutoff | - | 2026-02-01 | — |
| API / provider | xAI | xAI | — |
| Modalities | text, image → text | text, image → text | — |
| Specs | |||
| Context window | 1M | 1M | tie |
| Max output | 64K | 128K | B +64K |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $1.25 | $1.25 | tie |
| Output $/1M | $2.50 | $2.50 | tie |
| Blended $/1M (3∶1) | $1.56 | $1.56 | tie |
| Speed | |||
| tok/s | 83 | 110 | B +27 |
| TTFT (s) | 0.4 | 0.3 | B +0.10 |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | — | 90.1 | — |
| Humanity's Last Exam | — | 37.2 | — |
| AIME 2025 | — | — | — |
| MATH-500 | — | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | — | 34.8 | — |
| AA-LCR v1.1 | — | 73.0 | — |
| CritPt | — | 8.0 | — |
| MMMU-Pro | — | 78.1 | — |
| IFBench | — | 81.3 | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | — | — | — |
| Terminal-Bench 2.1 | — | 39.7 | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | — | — |
| BigCodeBench | — | — | — |
| SciCode | — | 48.3 | — |
| CursorBench | — | — | — |
| SWE-Rebench | — | — | — |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | — | — |
| WebDev Arena | — | 1,357 | — |
| Terminal-Bench 4.0 | — | — | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | — | 1,443 | — |
Grok 4.20
- Context
- 1M / 64K out
- Parameters
- —
- Price
- $1.25 / $2.50
- Speed
- 83 tok/s · 0.4s TTFT
- Modalities
- text, image → text
- License
- Proprietary
High-speed Grok 4.x mid-tier with 1M context at $1.25/$2.50 (doubles above 200k prompt tokens); current API snapshot is grok-4.20-0309-reasoning.
Grok 4.3
- Context
- 1M / 128K out
- Parameters
- —
- Price
- $1.25 / $2.50
- Speed
- 110 tok/s · 0.3s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Fast tool-calling Grok with 1M context at $1.25/$2.50 (doubles above 200k prompt tokens); aliased as grok-latest.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.
These two models have no overlapping published benchmarks in our dataset. Compare specs and pricing instead.