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c8i-flex EC2 instance family

Intel Xeon 6975P-C at 3.9 GHz, x86_64, 2 to 64 vCPUs, 4 to 128 GiB

Prices Description Specs Performance ranking Available Regions Prices by region
Open c8i-flex in the finder →
c8i-flex prices per hour on Windows, each type in its cheapest region
Type vCPU Memory Typical spot On-demand Cheapest region Per vCPU-hour
c8i-flex.large2 vCPU, 4 GiB 2 4 GiB $0.0963 $0.1764 ap-south-2 of 20 $0.0481
c8i-flex.xlarge4 vCPU, 8 GiB 4 8 GiB $0.1926 $0.3528 ap-south-2 of 20 $0.0481
c8i-flex.2xlarge8 vCPU, 16 GiB 8 16 GiB $0.3852 $0.7057 ap-south-2 of 20 $0.0481
c8i-flex.4xlarge16 vCPU, 32 GiB 16 32 GiB $0.7704 $1.411 ap-south-2 of 20 $0.0481
c8i-flex.8xlarge32 vCPU, 64 GiB 32 64 GiB $1.541 $2.823 ap-south-2 of 20 $0.0481
c8i-flex.12xlarge48 vCPU, 96 GiB 48 96 GiB $2.311 $4.234 ap-south-2 of 20 $0.0482
c8i-flex.16xlarge64 vCPU, 128 GiB 64 128 GiB $3.082 $5.645 ap-south-1 of 20 $0.0482

Per hour on Windows, in each type's cheapest region. Typical spot: per pricing run of the last 7 days, the cheapest zone's spot price, averaged, as the finder shows it with that region selected. On-demand: the same region's price. Per vCPU-hour: the spot price, or without spot the on-demand price, per vCPU. Every region is under Prices by region.

The C8i-flex instance family, generally available since October 6, 2025, features custom Intel Xeon 6 processors with a sustained all-core turbo frequency of 3.9 GHz. These compute-optimized instances deliver up to 15% better price performance compared to previous generation instances. C8i-flex instances support up to 30 Gbps of networking bandwidth and up to 20 Gbps of EBS bandwidth. They do not offer instance storage and are built on the AWS Nitro System.

Written by Gemini from web sources and not checked: the specs and prices on this page come from AWS.

Instance Types
c8i-flex.large c8i-flex.xlarge c8i-flex.2xlarge c8i-flex.4xlarge c8i-flex.8xlarge c8i-flex.12xlarge c8i-flex.16xlarge
vCPUs
2 to 64
Memory
4 to 128 GiB
Architecture
x86_64
Processor
Intel Xeon 6975P-C
Sustained clock
3.9 GHz
Single-thread PassMark
3256 estimated from m8i (same CPU)
Specs of each type
Type vCPU Memory Local storage Network EBS
c8i-flex.large 2 4 GiB EBS only up to 12.5 (0.468 baseline) up to 10 (0.315 baseline)
c8i-flex.xlarge 4 8 GiB EBS only up to 12.5 (0.937 baseline) up to 10 (0.63 baseline)
c8i-flex.2xlarge 8 16 GiB EBS only up to 15 (1.875 baseline) up to 10 (1.25 baseline)
c8i-flex.4xlarge 16 32 GiB EBS only up to 15 (3.75 baseline) up to 10 (2.5 baseline)
c8i-flex.8xlarge 32 64 GiB EBS only up to 15 (7.5 baseline) up to 10 (5 baseline)
c8i-flex.12xlarge 48 96 GiB EBS only up to 22.5 (11.25 baseline) up to 15 (7.5 baseline)
c8i-flex.16xlarge 64 128 GiB EBS only up to 30 (15 baseline) up to 20 (10 baseline)

Network and EBS: peak bandwidth in Gbit/s, with the bandwidth the type sustains when it is lower. Local storage: the instance store, in decimal GB as AWS sizes it.

Ranked by PassMark single-thread score
All x86_64 arm64
#1
m8azn, x8aedz
4257
#3
m8a, c8a, hpc8a, r8a
3803 3801–3803
#7
m8i, m8ib, m8id, m8in, m8idb, m8idn, m8ine, m8i-flex, c8i, c8i-flex, c8ib, c8id, c8in, c8ine, r8i, r8i-flex, r8ib, r8id, r8idb, r8idn, r8in, t8i, x8i
3271 3243–3271
#30
i7i, r7iz
3115 3105–3115
#32
m7a, c7a, c7i, hpc7a, r7a
2955 2875–2955
#37
m7i, r7i
2816 2763–2816
#39
c7i-flex
2700
#40
m6a, m5zn, m7i-flex, c6a, hpc6a, i7ie, r6a, x2iezn
2596 2549–2596
#48
m6i, m6id, m6in, m6idn, c6i, c6id, c6in, hpc6id, i4i, r6i, r6id, r6idn, r6in, x2idn, x2iedn, z1d
2303 2269–2303
#64
c5a, c5ad, c5d
2034 1995–2034
#67
m5d, c5, c5n
1901 1853–1901
#70
m5dn, c4, r5dn, r5n, t2, t3
1777 1746–1777
#76
m5, m5n, i3en, r5, r5b, r5d
1703 1686–1703
#82
m4, c3, i3
1625 1582–1625
#85
r3, r4
1539 1525–1539
#87
m5a, m5ad, r5a, r5ad, t3a
1414 1388–1414

Not benchmarked yet 44

These families have no PassMark single-thread score yet, so they are not ranked.

c1, d2, d3, d3en, dl2q, f2, g4dn, g5, g6, g6e, g6f, g7, g7e, gr6, gr6f, h1, i2, inf1, inf2, m1, m2, m3, mac1, p3dn, p4d, p4de, p5, p5en, p6-b200, p6-b300, t1, trn1, trn1n, u-3tb1, u-6tb1, u7i-12tb, u7i-6tb, u7i-8tb, u7in-16tb, u7in-24tb, u7in-32tb, vt1, x1, x1e

20 regions with a price in the last 7 days. Select up to 4 to compare them in the price history charts under Prices by region.

Atom feed for new regions

Each type's regions on Windows, cheapest first, with the same figures as the Prices table, and its price history: the daily mean of every zone and pricing run, over the last 15 UTC days. Each price column is tinted from its cheapest region (green) to its most expensive (red).

c8i-flex.large2 vCPU, 4 GiB, 20 regions
c8i-flex.large prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.0963 $0.1764 45%
us-east-1 N. Virginia $0.0963 $0.1764 45%
us-east-2 Ohio $0.0963 $0.1764 45%
eu-south-2 Spain $0.0970 $0.1829 47%
ap-northeast-2 Seoul $0.0975 $0.1880 48%
eu-west-2 London $0.0994 $0.1932 49%
us-west-2 Oregon $0.1000 $0.1764 43%
ap-south-1 Mumbai $0.1001 $0.1764 43%
sa-east-1 São Paulo $0.1011 $0.2246 55%
us-west-1 N. California $0.1018 $0.1984 49%
eu-west-3 Paris $0.1018 $0.1932 47%
ca-central-1 Canada Central $0.1022 $0.1848 45%
ap-southeast-2 Sydney $0.1045 $0.2037 49%
ap-southeast-1 Singapore $0.1048 $0.1900 45%
af-south-1 Cape Town $0.1055 $0.2068 49%
eu-central-1 Frankfurt $0.1055 $0.1890 44%
ap-northeast-1 Tokyo $0.1072 $0.1995 46%
eu-west-1 Ireland $0.1102 $0.1829 40%
ap-southeast-5 Malaysia $0.1115 $0.1746 36%
ap-southeast-6 New Zealand $0.1214 $0.2095 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.xlarge4 vCPU, 8 GiB, 20 regions
c8i-flex.xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.1926 $0.3528 45%
us-east-1 N. Virginia $0.1926 $0.3528 45%
us-east-2 Ohio $0.1926 $0.3528 45%
eu-south-2 Spain $0.1939 $0.3658 47%
ap-northeast-2 Seoul $0.1949 $0.3759 48%
eu-west-2 London $0.1989 $0.3864 49%
us-west-2 Oregon $0.2001 $0.3528 43%
ap-south-1 Mumbai $0.2001 $0.3528 43%
sa-east-1 São Paulo $0.2022 $0.4492 55%
eu-west-3 Paris $0.2036 $0.3864 47%
us-west-1 N. California $0.2038 $0.3968 49%
ca-central-1 Canada Central $0.2044 $0.3696 45%
ap-southeast-2 Sydney $0.2091 $0.4073 49%
ap-southeast-1 Singapore $0.2095 $0.3801 45%
af-south-1 Cape Town $0.2111 $0.4136 49%
eu-central-1 Frankfurt $0.2115 $0.3780 44%
ap-northeast-1 Tokyo $0.2144 $0.3989 46%
eu-west-1 Ireland $0.2205 $0.3658 40%
ap-southeast-5 Malaysia $0.2229 $0.3493 36%
ap-southeast-6 New Zealand $0.2427 $0.4189 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.2xlarge8 vCPU, 16 GiB, 20 regions
c8i-flex.2xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.3852 $0.7057 45%
us-east-1 N. Virginia $0.3852 $0.7057 45%
us-east-2 Ohio $0.3852 $0.7057 45%
eu-south-2 Spain $0.3878 $0.7316 47%
ap-northeast-2 Seoul $0.3898 $0.7518 48%
eu-west-2 London $0.3978 $0.7727 49%
us-west-2 Oregon $0.4000 $0.7057 43%
ap-south-1 Mumbai $0.4003 $0.7057 43%
sa-east-1 São Paulo $0.4045 $0.8984 55%
eu-west-3 Paris $0.4071 $0.7727 47%
us-west-1 N. California $0.4071 $0.7937 49%
ca-central-1 Canada Central $0.4088 $0.7392 45%
ap-southeast-2 Sydney $0.4184 $0.8146 49%
ap-southeast-1 Singapore $0.4190 $0.7602 45%
eu-central-1 Frankfurt $0.4217 $0.7560 44%
af-south-1 Cape Town $0.4221 $0.8272 49%
ap-northeast-1 Tokyo $0.4289 $0.7979 46%
eu-west-1 Ireland $0.4413 $0.7317 40%
ap-southeast-5 Malaysia $0.4458 $0.6986 36%
ap-southeast-6 New Zealand $0.4853 $0.8379 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.4xlarge16 vCPU, 32 GiB, 20 regions
c8i-flex.4xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.7704 $1.411 45%
us-east-1 N. Virginia $0.7704 $1.411 45%
us-east-2 Ohio $0.7704 $1.411 45%
eu-south-2 Spain $0.7756 $1.463 47%
ap-northeast-2 Seoul $0.7796 $1.504 48%
ap-northeast-1 Tokyo $0.7889 $1.596 51%
eu-west-2 London $0.7959 $1.545 49%
us-west-2 Oregon $0.8002 $1.411 43%
ap-south-1 Mumbai $0.8006 $1.411 43%
sa-east-1 São Paulo $0.8090 $1.797 55%
us-west-1 N. California $0.8132 $1.587 49%
eu-west-3 Paris $0.8141 $1.545 47%
ca-central-1 Canada Central $0.8178 $1.478 45%
ap-southeast-2 Sydney $0.8357 $1.629 49%
ap-southeast-1 Singapore $0.8380 $1.520 45%
eu-central-1 Frankfurt $0.8435 $1.512 44%
af-south-1 Cape Town $0.8442 $1.654 49%
eu-west-1 Ireland $0.8818 $1.463 40%
ap-southeast-5 Malaysia $0.8918 $1.397 36%
ap-southeast-6 New Zealand $0.9712 $1.676 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.8xlarge32 vCPU, 64 GiB, 20 regions
c8i-flex.8xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $1.541 $2.823 45%
us-east-1 N. Virginia $1.541 $2.823 45%
us-east-2 Ohio $1.541 $2.823 45%
eu-south-2 Spain $1.551 $2.927 47%
ap-northeast-2 Seoul $1.559 $3.007 48%
eu-west-1 Ireland $1.579 $2.927 46%
eu-west-2 London $1.594 $3.091 48%
us-west-2 Oregon $1.600 $2.823 43%
ap-south-1 Mumbai $1.601 $2.823 43%
sa-east-1 São Paulo $1.618 $3.594 55%
us-west-1 N. California $1.626 $3.175 49%
eu-west-3 Paris $1.630 $3.091 47%
ca-central-1 Canada Central $1.636 $2.957 45%
ap-southeast-2 Sydney $1.642 $3.259 50%
ap-southeast-1 Singapore $1.677 $3.041 45%
eu-central-1 Frankfurt $1.687 $3.024 44%
af-south-1 Cape Town $1.698 $3.309 49%
ap-northeast-1 Tokyo $1.715 $3.192 46%
ap-southeast-5 Malaysia $1.784 $2.794 36%
ap-southeast-6 New Zealand $1.943 $3.352 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.12xlarge48 vCPU, 96 GiB, 20 regions
c8i-flex.12xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $2.311 $4.234 45%
us-east-1 N. Virginia $2.311 $4.234 45%
us-east-2 Ohio $2.311 $4.234 45%
us-west-2 Oregon $2.311 $4.234 45%
eu-south-2 Spain $2.327 $4.390 47%
ap-northeast-2 Seoul $2.339 $4.511 48%
eu-west-3 Paris $2.351 $4.636 49%
us-west-1 N. California $2.364 $4.762 50%
eu-west-2 London $2.386 $4.636 49%
ap-south-1 Mumbai $2.402 $4.234 43%
sa-east-1 São Paulo $2.427 $5.391 55%
ca-central-1 Canada Central $2.454 $4.435 45%
ap-southeast-2 Sydney $2.509 $4.888 49%
ap-southeast-1 Singapore $2.514 $4.561 45%
eu-central-1 Frankfurt $2.531 $4.536 44%
af-south-1 Cape Town $2.533 $4.963 49%
ap-northeast-1 Tokyo $2.564 $4.787 46%
eu-west-1 Ireland $2.645 $4.390 40%
ap-southeast-5 Malaysia $2.676 $4.192 36%
ap-southeast-6 New Zealand $2.934 $5.027 42%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
c8i-flex.16xlarge64 vCPU, 128 GiB, 20 regions
c8i-flex.16xlarge prices per hour on Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-1 Mumbai $3.082 $5.645 45%
us-east-1 N. Virginia $3.082 $5.645 45%
us-east-2 Ohio $3.082 $5.645 45%
us-west-2 Oregon $3.082 $5.645 45%
eu-south-2 Spain $3.102 $5.853 47%
eu-west-1 Ireland $3.118 $5.853 47%
ap-northeast-2 Seoul $3.119 $6.014 48%
us-west-1 N. California $3.152 $6.349 50%
eu-central-1 Frankfurt $3.227 $6.048 47%
sa-east-1 São Paulo $3.236 $7.188 55%
ca-central-1 Canada Central $3.273 $5.914 45%
af-south-1 Cape Town $3.377 $6.618 49%
ap-northeast-1 Tokyo $3.441 $6.383 46%
ap-south-2 Hyderabad $3.491 $5.645 38%
ap-southeast-5 Malaysia $3.571 $5.589 36%
ap-southeast-1 Singapore $3.785 $6.082 38%
eu-west-2 London $3.809 $6.182 38%
ap-southeast-6 New Zealand $3.889 $6.703 42%
eu-west-3 Paris $4.011 $6.182 35%
ap-southeast-2 Sydney $4.546 $6.517 30%
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
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