Claude Haiku 4.5 vs Claude Opus 4.8

rates, context and capabilities side by side on the impossibl api, and what the same workload costs on each.

the models at a glance: base rates, context window and modalities
specificationClaude Haiku 4.5

anthropic/claude-haiku-4-5

Claude Opus 4.8

anthropic/claude-opus-4-8

input · usd / 1m tok$1.00$5.00
output · usd / 1m tok$5.00$25.00
context window200ktokens1mtokens
modalities · in → out

takes text and image in, gives text out

takes text and image in, gives text out

pricing

base api rates by model
base api rates · usd per 1m tokensClaude Haiku 4.5

anthropic/claude-haiku-4-5

Claude Opus 4.8

anthropic/claude-opus-4-8

input$1.00$5.00
output$5.00$25.00
cache read$0.10$0.50
cache write · default ttl$1.25$6.25
cache write · 1h ttl$2.00$10.00

the estimate below prices one workload at these rates on every model.

specifications

published specifications by model
as publishedClaude Haiku 4.5

anthropic/claude-haiku-4-5

Claude Opus 4.8

anthropic/claude-opus-4-8

creatorAnthropicAnthropic
model typeText generationText generation
context window200,000tokens1,000,000tokens
input

takes text and image in, gives text out

takes text and image in, gives text out

outputtexttext
tool callingnot verifiednot verified
releasedoct 15, 2025may 28, 2026
endpoint/v1/chat/completions/v1/chat/completions

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

benchmarks

benchmark scores by model, primary tested configuration
primary configurationClaude Haiku 4.5

anthropic/claude-haiku-4-5

non-reasoning

Claude Opus 4.8

anthropic/claude-opus-4-8

max

intelligence index · gateway rank15.4#84 of 10841.8#23 of 108
omniscience-7.6#45 of 8428.8#6 of 84
gpqa64.6%#72 of 80
92.0%#15 of 80
humanity’s last exam4.2%#78 of 87
48.7%#7 of 87
coding indexnot measured74.3#15 of 64
agentic indexnot measured41.9#17 of 53
mmmu-pro55.1%
not measured
livecodebench51.1%
not measured
aa-lcr49.7%
77.7%
ifbench42.0%
62.2%
aime 202539.0%
not measured
tau232.5%
94.4%
terminal-bench hard27.3%
58.3%
multilingual lcr4.4%
45.6%
critpt0.0%
20.9%
scicodenot measured54.4%
automationbench partialnot measured45.6%
analystagentnot measured45.0%
tau bankingnot measured34.2%
gdp.pdf all-passnot measured22.8%

Claude Haiku 4.5 source ↗Claude Opus 4.8 source ↗

each column describes the tested configuration named under the model; performance and costs can differ on impossibl. a score one model was not measured on is left blank rather than scored zero. indices are ranked against every model on the gateway with one. last checked 2026-10-14.

estimate your cost

one token workload, priced on every model at the published rates, in usd. change the numbers to match yours.

token workload

total input, including cached tokens

include billable reasoning tokens

the same token usage in each request

a subset of total input, never additional tokens

Claude Haiku 4.5

anthropic/claude-haiku-4-5

estimated usage cost

$3.50

1,000 requests × (1,000 uncached input × $1.00 + 500 output × $5.00) / 1,000,000 = $3.50

base rates; no context pricing tiers are published.

Claude Opus 4.8

anthropic/claude-opus-4-8

estimated usage cost

$17.50

1,000 requests × (1,000 uncached input × $5.00 + 500 output × $25.00) / 1,000,000 = $17.50

base rates; no context pricing tiers are published.

estimates use published impossibl api usage rates. configured billing adjustments, funding fees, taxes, and custom workspace rates are excluded and may change the final amount.

image and audio usage, cache creation, and additional tool charges are excluded. reasoning tokens count as billable output, even when they are not visible in the response.

summary

Claude Haiku 4.5 and Claude Opus 4.8 are available through the Impossibl API. they share the /v1/chat/completions endpoint; the model identifier selects the model for a request.

Claude Haiku 4.5 is created by Anthropic. It has a 200,000-token context window. Base API pricing (USD): $1.00 per million input tokens; $5.00 per million output tokens.

Claude Opus 4.8 is created by Anthropic. It has a 1,000,000-token context window. Base API pricing (USD): $5.00 per million input tokens; $25.00 per million output tokens.

Claude Haiku 4.5 →Claude Opus 4.8 →

this page compares Claude Haiku 4.5 vs Claude Opus 4.8 as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes.

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